The case is crimped tigthly into a groove in the base of the projectile by a single conti-nuous crimp.

Unperforated cylindrical sticks, approximately 0.9 mm (1/32 inch) by 6-7 inches, amber-colored double-base powder.

The propellant sticks are enclosed in a compartemented bag of heavy brownish silk.

Primer: Mk 1 case percussion primer, Model 4.

Weapon in which used: Short 12 cm gun.

This is a short-barreled (12 caliber) gun of low muzzle velocity and light construction on a pedestal mount design 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-sub-marine attack and to throw up low level anti-air-craft barrage.

This gun fires fixed ammunition; the breech block is of the interrupted thread type. This gun is the lighter-caliber counter-part of the short 20-cm gun, which has been found mounted ashore.

Figure 382 – 12-cm Short Complete Round (Fixed).