The following identification markings are used on the undermentioned ammunition:–

20-mm Solothurn (0.787-inch) fired by 2-cm A.A./A.tk. gun and 2-cm tank gun).

The body is painted to indicate the nature of the projectile. The colours used and their indications are:–

Yellow

Black

Olive Green

Grey

Coloured bands on the projectile are used to indicate – (a) colour of trace, (b) absence of self-destroying arrangement, (c) certain natures of filling and (d) rounds for use in tropics.

With the exception of 20-mm Oerlikon light case H.E. shell (marked with a black ring near the head) all H.E. shell provide a trace, but this is not indicated by a band if the colour of the trace is the normal pale green or white. The bands used for other colours and for ball or A.P. are adjacent to the driving band and vary in width from 2.5 mm to 6 mm ac-cording the calibre. The colours of the bands and the corresponding traces are:–

Red band

White band

Yellow band

None of the 13-mm projectiles is self-destroying, but no special marking indicates this. 15-mm and 20-mm projectiles have been found marked imnediately above the driving band or below the fuze. The marking used is:–

Black band

This marking is used near the ogive of the 30-mm A.P. shell with an H.E. filling to indicate the H.E. fillings.

This marking round the centre of the shell indicates an incendiary filling in addition to the H.E. bursting charge. In the case of the 13-mm H.E./In-cendiary shell the band has been found below the fuze.

The band, 2 mm wide, is found immediately in front of the driving band and may be superimposed on the tracer band. The smaller calibres, i.e. 15 mm, have this band painted round the junction of the mouth of the case and driving band.

The 20-mm Solothurn A.P.T. has a phosphorus filling but is not marked with a blue band. The letters "Ph" are stencilled in white.

A 20-mm Solothurn shell painted yellow and marked with a 5-mm black band of thin cir-cumferential lines aboe the driving band has recently appeared. The shell has an H.E. fil-ling with an incendiary mixing and has a pale green trace. A self-destroying arrangement is included.