M37 Series Variants (M43, M56,
etc..) and Misc. Plates 
Legend:
NAATT = Not Available At This Time SA = Screened Aluminum S = Sticker D = Decal EB = Etched Brass EA = Etched Aluminum CAST = Literally cast in a mold NOS = New Old Stock or surplus R = Reproduction
Example: EBNOS = Etched Brass New Old Stock or CASTR = CAST Reproduction
