A Luftwaffe Regiment Identification Tag (Erkennungsmarke)

In stamped aluminum; the obverse stamped “1. A Stb. J. R. 400.” on both sides of the triple slotted centre; the reverse “1. St./Lw. J. R. 100” on both sides of the triple slotted centre (crossed out) - suggesting that the bearer transferred units and changed ranks; three drill holes; with original black/white necklace; measuring 50 mm x 70 mm; extremely fine condition.