British unit marking

[Mark W. Tonner]

Mike;

I've found a 538, but on Red/Green (R.A.S.C.), under GHQ, L. of C. and Army Troops, 1st Army, 31 Dec 1942.

Unit: 64 L.A.A. Regt Platoon, R.A.S.C.

Have found no other reference to 538 on Red.

Hope this helps

Cheers