Bidspirit auction | Germany - Semi - Postal

Germany - Semi - Postal issues - 1943, Labor Service, die proof of 6+14(pf) in black, die sunk 60x100mm on glossy thin card, dated at the bottom in pencil, card size 83x142mm, no gum as produced, VF and very rare, Mi #852P, die proofs are not listed in Michel, Est. $500-$600 , Scott #B239