British No.1 Mk 1 Flare Pistol with shoulder stock
| 01. Original name | Pistol, signal, 1 I/2-inch, No. 1 Mark I, with ancillary shoulder piece (butt) attached | |
| 02. Other official names | No.1 Mk 1 Signal Pistol | |
| 03. Popular names | ||
| 04. Chamberings | 37mm | |
| 05. Designed by | Webley & Scott | |
| 06. Design date | 1914 | |
| 07. In service date(s) | 1914 onwards. Observed in use by British military in N Ireland during 1970s | |
| 08. Adopted by | Royal Flying Corps | |
| 09. Production quantities | During WW1, 26,400 made by Webley & Scott | |
| 10. Mechanism | Utilises the frame of the Webley & Scott Mk IV revolver: steel frame and barrel, single and double action, stirrup latch retains barrel. Wood stock.. | |
| 11. Weight | 7.75lb (3.5kg) | |
| 12. Mountings | Length 26″ (660mm) barrel 10″ (254mm) | |
| 13. Practicality in action | Originally made for Royal Flying Corps to fire heavy charge parachute flares for ground to aircraft signalling | |
| 14. Comments / Other information |