Ahh Well just trying to help a little?
Seems like 1021A has the "tracer" lenses, thanks for showing them . I still think the main use for red lenses would have been to look cool on a tank!
[/COLOR][CENTER][COLOR=#ff0000][SIZE=3]URGENTLY LOOKING FOR: 1982 era Argentine military issue goggles. Fravida 109, and "Sanbuee" French lens type
[/SIZE]Have a look at my 20+ (so far, work in progress) albums for lots of M1's, rare liners and other stuff, including WW2British helmets, Falklands battlefield pickup helmets and let me know what you think!
I guess maybe the A is for aviation?