375rd Heinrich Köhler auction - Day 1

1918, Lublin Issue 10h. green two singles and 20h. lilac-red in mixed franking with Austria Military stamp 5h. green, tied by cds. "LUBLIN 7.XII.18" to large format registered cover to Vienna, 20h. one short perf, the cover folded vertically, otherwise fine and with only 5 commercial covers bearing the 10h. known a rarity, signed Mikulski and Petriuk with detailed certificate (2020)