375rd Heinrich Köhler auction - Day 1

Thiele 4 rbs. brown with ample to good margins, tied by target cancel to letterfront with 2 side flaps with adjacent "ECKERNFÖRDE 16/9 52" to Schleswig with the stamp applied in the lower left of the entire with adjacent manuscript "frei", partly tying the stamp; since this was contrary to the postal regulations the letter was charged "3/4" schilling courant in red crayon, payable by the recipient, fine