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

Propellant, 30 DC (type 13 propellant): 12.0 pound (5.50 kg).

Unperforated cylindrical sticks, approximately 3.0-mm (3/32-inch - 1/8-inch) by 19.8 in-ches, graphited double-base powder.

In the H.E. rounds recovered, the propellant sticks are enclosed in a bag of heavy brownish silk.

In the incendiary shrapnel round the sticks of propellant were tied together and placed in the case without being enclosed in the customary coarse silk bag. The latter arrange-ment may be a new trend not necessarily limeted to the round in which it was first found.

Primer: Mk 2 case percussion primer, Model 4.

Weapon in which used: Type 10th year 12-cm/45 dual-purpose gun.

This weapon is a pedestal-mounted gun designed for antiaircraft use aboard ship which has been found ashore either with or without a distinctive gun-house type of shield. The gun is manually controlled. The breech-block is the horizontal type, sliding to the right. This has been one of the most common and most effective Japanese land-based A.A. guns.

Figure 391 – 12-cm Complete Round (Fixed).