Producer: Denayrouze
Type: screw in
Estimated age: 1890
Total length: 14 1/2 inches
Blade: Steel 2 sides sharp 9 1/2 inches long
Inscription: none
Sheath: Brass
Handle: Brass
Remarks: No drainage hole


Photo courtesy of Jan Hasselbach

Producer: Beleived to be Denayrouze
Type: Screw-in
Estimated age: 1900
Total length: Approx 12 inches (30 cm)
Blade: steel, one sharp side
Inscription: None
Sheath: Brass
Handle: Brass


Producer: Rouquayrol Denayrouze
Type: screw in
Estimated age: 1925
Total length: 14.96"
Blade: steel, one sharp side
Inscription: n.a
Sheath: solid brass
Handle: solid brass
Remarks: Base for later knifes produced by Draeger and other companies


With thanks to and photo courtesy of Wil Kuijpers

Producer: La Spirotechnique
Type: Put In
Estimated DOM: 1970
Total length: 30 Centimeters (12 inches)
Blade: 17 centimeters 1 sharp side 1 serrated side, End screwdriver shape
Inscription/Logo: Scuba diver with steering wheel. La Spirotechnique / SPIRODAG - Navy no inscription 13 13
Sheath: Synthetic
Handle: Synthetic material with inscription one side SPIRODAG. Other side La Spirotechnique Made in France.
Remarks: Used by the Royal Dutch Navy. These knives were also standard equipment used with compressed air set type Loos & Co. ca 1970. Check out Wil Kuijpers the contributor of this photo in the Modern Photo Gallery.