| 1920 SCHNEIDER CIE Loading Guns Art Print |
| 1920 KRUPP AG Arrangement Track Railway Guns Art |
| 1920 KRUPP AG Arrangement Rails Railway Guns Art |
| 1920 RUDOLF Arrangement Track Railway Guns Art |
| 1920 EUGENE Varying Recoil Guns Art Print |
| 1920 SCHNEIDER CIE Sighting Guns Art Print |
| 1920 SCHNEIDER CIE Aiming Guns Art Print Patent |
| 1920 SCHNEIDER CIE Varying Recoil Guns Art |
| 1920 TREVOR Sighting Anti Aircraft Guns Art |
| 1920 MESSERSMITH Tripod Mounting Guns &C Art |
| 1920 PAUL Arrangement Rails Railway Guns Art |
| 1920 SCHNEIDER CIE Hydraulic Brake Guns Art |
| 1920 VICKERS LTD Sighting Anti Aircraft Guns Art |
| 1920 ITHACA GUN CO Bolting Mechanism Guns Art |
| 1920 ARTHUR C BROWN Mounting Heavy Guns Art |
| 1920 STRICKLAND Trigger Double Barrel Guns Art |
| 1920 WORKEN Flash Absorber Machine Guns Art |
| 1920 LEFEVER Lever Arm For Guns Patent Print Art |
| 1920 VEEDER Indicator Magazine Guns Art Print |
| 1920 GEORGE Mount Stand Machine Guns Art Print |
| 1920 NEWITT Adjustable Front Sight Guns Art |