The shell is fired from the Q.F. 75 mm 27 calibre gun-howitzer with a separate loading Q.F. cartridge.

The head of the shell, including the fuze-hole adapter, is red down to its junction with the body. The remainder of the shell is pale blue, with a green band above the driving band, and is stencilled "75/27". The T.N.T. bursting charge is indicated by the stencilling "TRITOLO". The overall length of the fuzed shell is 12.4 inches, and the weight filled and fuzed is 13 lb. 14 oz. 6 dr.

The streamlined forged steel shell is in two main parts, the ogival head being screwed on above the shoulder and secured by a fixing screw. Circular recesses are formed in the head of receive the assembly tool. The shell is fitted with a copper driving band with a single cannelure, and has a comparatively thin wall of parallel section. A mild steel base plate is pressed into the base.

The fuze-hole adapter is of mild steel and is shaped at the head to correspond with the contour of the shell. The adapter is screw-threaded externally for insertion in the shell and internally to receive the fuze and the exploder container. A foxong screw is provided for the fuze, and circular recesses are formed to receive the assembly tool.

The exploder container is of mild steel, and consists of a tubular pocket about 3.8 inches in depth, with an external screw-thread at its upper end for insertion in the adapter.

The bursting charge consists of approximately 1 lb. 6 oz. 7 dr. of cast T.N.T., with a 5.3 inch cavity to accommodate the exploder container and the lower part of the adapter. The upper part of the cavity is enlarged in diameter to receive the adapter, and the whole of the cavity wall is supported by an aluminium liner. A felt disc is inserted bet-ween the base of the liner and the base of the exploder container.

The exploder consisits of two cylindrical pressed pellet of T.N.T. enclosed in a transpa-rent paper wrapping. The upper pellet has a cavity to accommodate the gaine. The wrapper is marked "Per. Deton. A.E. No. 1". A cardboard disc, followed by a felt disc, is inserted in the exploder container beneath the exploder. The weight of the exploder is 1 oz.

A description of the fuze, the Inneschi graze fuze, and the 0.89 gram cyclonite gaine used in this shell are included in this pamphlet.