Unperforated cylindrical sticks, approximately 1 mm (1/32 inch) by 8 1/2 - 9 inches, am-ber-colored double-base powder.

The propellant sticks are enclosed in two compartmented bags of heavy brownish silk. The inner bag contains 0.960 kg. (2.1 pounds) of propellant. The outer bag contains 1.040 kg. (2.3 pounds) of propellant.

Primer: Mk 1 case percussion primer Model 4.

Weapon in which used:

Short 20 cm gun.

This is a short-barreled (12 cal.) gun of low muzzle velocity and light construction on a pedestal mount designed originally for use on the light decks of merchant ships. The pur-pose of this weapon is to deliver a relatively heavy projectile at a limited range for anti-submarine attack and to throw up low-level antiaircraft barrage.

This gun fires semifixed ammunition; the breechblock is of the interrupted-thread type. It has been found mounted in shore emplacements.

Figure 416 – 20-cm Short Complete Round (Semifixed).