21 SECOND COMBINATION FUZE MODEL OF 1907 M.
COMBINATION FUSES.
| Fuse. | Total time burning Sec. | Corresponding French Type. | On what projectile used. | By what cannon fired. | Wt. of fuse. |
| 21 s/comb. F. A., 1907 M. | 21 | 22/31M 1897, 24 sec. | Com. Shrapnel. MKi. | All 3” and 75-mm guns | 1¼ lbs. |
| 21 s/comb. F.A., 1915 | 21 | 22/31M 1916, 24 sec. AA. | Com. Shrapnel. MKi. | All 3” and 75-mm guns | 1¼ lbs. |
| 31 s/comb. F. A. 1915 | 31 | 30/55M 1889, 40 sec. | Com. Shrapnel. | 4.7” gun. | 2 lbs. |
| 45 s/comb. F. A. 1907 M. | 45 | Same as above. | |||
| 30/55M 1889, 40 sec. | Com. Shrapnel, MKi. | 155 How. | |||
| 30/55M 1913, 40 sec. AA. | C. S. Shell AA MKiii AA. Shrapnel. | 4.7” gun Anti-aircraft. |
ACTION OF AMERICAN AND FRENCH DETONATING FUSES.
| Time | zero | 1/100 | 2/100 | 5/100 | 15/100 |
| Color | No color. | Red. | White. | Black. | Black with violet socket. |
| American | MKii | None being made. | MK i | MK ii (SD) | MK ii (LD) |
| Detonating | Fuse is considered | MK ii (ND) | MK ii (SD) | MK iv (LD) | |
| unsafe | MK iV (ND) | MK V (SD) | |||
| safe | MK iV (ND) | MK V (SD) | |||
| Fuses | Will be abandoned by French | MK V (ND) | |||
| French detonating fuses | iAL. | 1 | SR. | AR. | LR. |
Notes on Ammunition Marking.
Marks on H. E. Shell. These are of two kinds.
(a) Stamped marks made with a steel punch on the body of the projectile just above the rotating band. These refer to the manufacture of the projectile.
(b) Painted marks or bands which are clearly visible. They refer to the loading, to the weight of the projectile and to the special purposes for which the projectile is to be used.