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| 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 |
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| 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 |
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| 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 |
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| 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. |