Whilst looking for markings of Field and anti tank RA, I struggle to locate anything related to LAA vehicle names. Trux info has personnel and quantity of vehicles but no lettering or numbering. Nigel's site doesn't cover them. The 39-45 site says they used elliptical shaped tac signs + a different layout for names. Was that valid 44-45? I can't see a flowchart structure either. But the 39-45 site says the battery hq was the same as a field reg?
My father was in F Troop, 318 Battery, 92nd LAA Regiment. The troop's Morris SP Bofors, with which they were first equipped in the summer of 1943, were designated F1, F2, F3, F4, F5 and F6 (my father was gunlayer on F3). The picture shows Gun F4 in action near Goch in the Rhineland in early 1945. I believe the 47 is the designation for divisional LAA. The troops in the regiment were A, B, C (317 Battery), D, E, F (318 Battery), G, H, I (319 Battery). So I Troop was used instead of K, as indicated in Note 3 of Rich's document.
