375rd Heinrich Köhler auction - Day 1

3 sk. lilac in horizontal pair (left stamp with perforation cut by scissors at left), tied by numeral "92" on lettersheet from "SKJELSKJØR 2 10" to Copenhagen. The 3 sk. pair affixed on top of an endorsement "franco", so the postal clerk charged the unpaid letter rate of 6 sk., which was noted at upper right of the envelope and was paid in stamps. Fine and rare letter