Siebe Gorman
THE SIEBE GORMAN 12-BOLT REPRODUCTION
HELMET (ALSO KNOWN AS THE ‘INDIAN FAKE’, OR ‘MUMBAI COPY’)
By MIKE BURCHETT
(Photos & graphics: Robert Burchett)
THE BACKGROUND STORY

This very good ‘Indian’ reproduction of a Siebe Gorman 12-bolt helmet has a
short, but interesting background (figures 1 and 3). It serves as a reminder
that “if one person can make it, so another person can fake it” (given enough
helmet knowledge and craft expertise). The reproduction helmet initially
deceived some experts and one or two helmets even passed through auction houses
as the genuine item.
The helmets started to appear on the UK market during the summer and autumn of
2005. The first batch of several helmets arrived in the UK from India, and most
helmets were quickly sold to eager buyers. The helmets were in near perfect
condition, all looked nearly identical and most had serially matched part
numbers (on helmet, corselet, faceplate and brails). Serial numbers between the
helmets were also sequentially close. The story told at the time was that the
helmets were part of a consignment destined for British colonial salvage
operations in the 1950s, but were rarely used, put into storage, and
subsequently re-discovered.
A few months later, a second batch of about 12 helmets became available from the
same source in India. Once again, the helmets were all very similar in looks to
those from the first batch, and many carried serially matched part numbers.
Serial numbers between the helmets was again sequentially close. However, as a
set of circumstances like this is “too good to be true”, the proverbial ‘alarm
bells’ started to ring. Some helmets from the second batch were closely examined
and found not to be genuine, but instead were very good forgeries. Following
this, the actions of the UK supplier was most commendable. The fraud was swiftly
and publically exposed, and the UK supplier acted in an honest and appropriated
manner to rectify the situation.
It is now known that these batches of reproduction helmets (together with other
Siebe Gorman apparatus and marine artefacts) were manufactured in northern India
by the same family of artisan craftsmen that still make them today (2010). These
reproduction helmets and other copy items are still being sold worldwide through
the internet to unsuspecting buyers, by a well known Mumbai exporter.
Unfortunately these fraudulent helmets are sometimes realising genuine helmet
prices, but as a fraudster knows, a very good copy is still only worth a
fraction of the price, compared with the genuine item.
As these reproduction helmets become more widely known, other ways are being
found to pass them off or sell them on. Some helmets are now being marketed
without the tinned surface (the tinning is removed and the surface mirror
polished). Other helmets may have air ducts, the maker’s name tag and serial
numbers missing altogether. It probably won’t be long before the first quality
reproduction 6-bolt helmet arrives on the market, so be vigilant!
It is unclear whether the reproduction ‘Indian’ helmet can be dived because of
some small, but significant differences. However, it would seem unwise to risk
diving with an incomplete helmet of dubious origin which may have components
made from poor quality, sub-standard materials.
THE REPRODUCTION HELMET
To the unsuspecting buyer or to an untrained eye, the Siebe Gorman reproduction
helmet can be difficult to distinguish from a genuine example (figure 1).
However, once several of these helmets have been closely examined, many little
differences soon become apparent, and the helmets become quite recognisable. If
a complete list of these differences were provided in this article, it is
possible that the forgers will just improve the next batch of forgery helmets.
Therefore, just a few of the most easily recognisable differences are given
here, which should be sufficient for a collector to identify the reproduction
helmet. Some information has already been published on the excellent French
website dedicated to historical diving apparatus. However, unless you speak the
language, the information may not be clearly understood. Hopefully this article
in English will help those of us with limited language skills.
Serial Numbers
Siebe Gorman helmet serial numbers are normally found on the underside of the
brails, the faceplate (but not always), inside the helmet neck ring and inside
the corselet ring. The five digit serial numbers on reproduction helmets mostly
start with ‘192’ (plus two following numbers). Sequential serial numbers for the
reproduction helmets start around ‘19250’ and approach ‘19299’. Therefore it is
possible that up to fifty reproduction helmets may have been made to date. In
addition, a few reproduction helmets have now been noted with serial numbers in
the early ‘193XX’ range (helmet 19312), which may suggest that more reproduction
helmets are being produced. Some genuine Siebe Gorman helmets and helmet parts
that carry serial numbers between ‘19250’ and ‘19312’ are known to exist, which
confirms the fraudulent nature of the reproduction helmets.
Some Feature Differences
When examining a potential reproduction helmet, a single comparative difference
should not be taken in isolation as proof of a forgery. If possible, a number of
distinctive and unique differences should be identified to produce a strong case
that the helmet is in fact, not genuine.
GENERAL APPEARANCE: an overall appearance of a helmet should look correct for its age. The ‘Indian’ reproduction helmets do not appear correct, as they are all too perfect and look too similar for their age (figures 1A and 1D). Few helmets are in perfect condition and most carry signs of wear associated with their past use (figure 1B)
MAKER’S NAME TAG: the
maker’s name tag on the corselet is always worth comparing with a genuine one of
the same style and from the same period. A comparison should be made with an
authenticated helmet that has a serial number close to that of the helmet under
suspicion. The ‘Indian’ reproduction name tag is an excellent copy, and there
are few noticeable differences, apart from a slight size discrepancy and
inadequate soldering of the tag to the corselet. As an exercise to “train the
eye”, there are a number of noticeable differences between the ‘Indian’
reproduction name tag, and an original one with a slightly different style of
lettering shown in figure 2.

Look closely and you will begin to appreciate a number of subtle differences
between the two name tags.
TINNING: the quality of
tinning is poor and quite patchy on some surface areas of the reproduction
helmets. The most obvious difference is in the ‘patina’ of the tinned surfaces.
The reproduction helmet surfaces have been artificially aged with chemicals, and
later tests suggest that an ammonia containing treatment (perhaps equine urine)
may have been used. This chemical appears to have been brushed on to the
surfaces of the helmet, giving the tinned areas a characteristic ‘streaky’
appearance (figures 1D and 3A-3E).

Compare this to the typical well tinned surface of a genuine helmet (figure 1C).
COLOUR: bright green, copper containing corrosion deposits (verdigris) often appear over wide areas of the reproduction helmet surfaces (figure 1A), and in some areas where they should not normally be expected (figure 7A). Most genuine helmets have some ‘verdigris’. However the ‘verdigris’ deposits on a reproduction helmets can be relatively thick and scaly, and the deposits flake away too readily.
SOLDERING: the quality of
the soft soldering is often poor where brass fittings are attached to the copper
helmet or corselet. The soft solder join around the perimeter of the
reproduction corselet often appears ‘ripple-like’ instead of ‘smooth’ (figure
4).

Slotted stud heads on the underside of the corselet are often left un-tinned on
reproduction helmets (figure 6B).
FITTINGS: the air inlet
elbow of the reproduction 12-bolt helmet uses a standard 6-bolt elbow fitting
(nut-shaped), instead of the more typical round-shaped one, that is seen on most
(but not all) 12-bolt helmets (figure 5).

Quite often, threads of various reproduction fittings (e.g. air inlet,
faceplate, corselet studs etc.) will not allow accurate fitting of genuine
parts. Position of rivets can also differ and some rivet heads may be ground off
or flattened on the reproduction helmets.
AGEING: apart from the
induced ageing of reproduction helmet with chemicals, false distressing is
sometimes observed on surfaces and edges. This is often applied by hammering or
filing (figure 6A).

HELMET COMMUNICATIONS: a reproduction helmet may have parts of the
communication system left inside the bonnet to add authenticity. Sometimes the
wiring may appear old, but quite often bright new, red and black ‘PVC’ coated
cable is used (figure 7B).

Finally, temper buying enthusiasm with caution and approach every helmet as a
potential forgery. Knowledge and experience are your only real allies, and it
can be a steep and sometimes expensive learning curve for the unwary buyer. Even
an expert is occasionally deceived by a forgery. If a helmet appears “too good
to be true”, then it probably is. The Latin phrase ‘Caveat emptor’, “Let the
Buyer Beware” is one worth remembering.
ACKNOWLEDGEMENTS
I would like to thank David Dekker, Dr. John Bevan and Phil Thurtle for their
helpful comments and suggestions while writing this article.
With special thanks to Mike Burchett for this article
'CONTINENTAL' REPLICA OF THE
SIEBE-HEINKE, 3-BOLT (4-light)
'LIGHTWEIGHT HARBOUR HELMET'

The Heinke 3-bolt 'Lightweight Harbour Helmet and Corselet' (with top glass or
light) was produced by C.E. Heinke & Co. Ltd. mostly during
the post war period. However, in 1961 Heinke was taken over by the firm of Siebe,
Gorman & Co. Ltd. and they continued to produce the lightweight
'Harbour Helmet' under their own name but with a few minor changes (including
the Siebe, Gorman style spitcock and their own name badge).
In essence Siebe, Gorman was using up the Heinke parts they had acquired during
the takeover for the continued manufacture of this helmet.
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Rear view of two of the replica helmets The
replica/copy version of the English 3-bolt (4-light) lightweight 'Harbour
Helmet' has been in circulation since mid-2010, and the helmet is found
with a Siebe, Gorman |
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Picture
showing the external banjo telephone connector and the interior of the
helmet showing the speaker. It should be remembered that a dealer who
sells a replica of a vintage A full article will follow at a later date. |
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Special thanks again go to Mike Burchett.
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helmet was found in an antique shop in Thailand.
Photos courtesy of Pierre Nyberg |
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| This helmet was found on a remote Island off the Chilean coast |
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| We have a 4 light replica Sebe Gorman of London helmet, also found off The coast of Chile | |
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Morse
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Have a look at this 4 light item. Is it a 3 bolt ? NO ! Is it a 12 bolt ? NO !, it's Super Grover !! It looks like a Draeger and it looks like an old Morse helmet. In the right picture you see a hole. Maybe our phony friends planned an exhaust there. Remember this is not a diving helmet and you should not have to pay a diving helmet price for it. |
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US NAVY MARK V
Probably the most replicated diving helmet in the world is the Mark V. The latest copies sometimes even have airducts and the interrupted screw thread! Be aware, before you know it you pay a real helmet price for a phony hat.
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This interesting item circulated the worlds biggest marketplace for a while. It is a US Navy Mark V from 1909. Now, that's interesting because George D. Stillson finished the design for the Mark V around 1915. This item was first offered as a real helmet and later as a reproduction. One of the few we have ever seen with nipples on the front and the back of the corselet. |
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From the MARK V
a lot of reproductions were made |
The best replica of the MARK V is the so called "8-29-41" that was made in Taiwan in 1980. |
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Korean MARK
V replica. The position of the phone booth |
English MARK
V Replica. |
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| One more for the road ! You will sometimes be offered this 8-29-41 reproduction with actual numbers beeing punched in the nametag. Do not fall for that trick. | |
Nametag
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Morse used OVAL nametags. This one is a reproduction that has NO number stamped in it. |
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Two original name tags:Schrader used this shape |
Another one trying to fool us!! You remembered to look at the nametag. Then you find a beautiful SCHRADER Mark V helmet on Ebay (at least: that is what you think) and start bidding like there is no tomorrow.
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We find the position of the air-inlet and the phone-connector rather strange: they must be in each others way. The telephone booth on this hat is, compared to real Mark V's, put way to far to the back. The top light seems to be a bit too far to the left. The mechanism to adjust the air-outlet is missing. There seems to be no hole to the inside of the helmet. Conclusion ? Nice try with a custom made nametag. Schrader NEVER used screws. Nametages were always SOLDERED. |
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Ever heard of the EMORY & DOUGLAS company producing Mark V diving helmets? As far as we are concerned they are in the phony business! Sold on Ebay for a real diving helmet price...... |
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Dear
Karin and Bert. I bought this helmet in an Indonesian antique shop. The
salesman was honest about the fact it was obviously fake. It cost
2,000,000 rupiah which is less than USD200. I think this to is a fair
price for an ornament considering material and the level of workmanship. Who knows more about Chinese, fully operational MkV's? Please contact us |
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