ZELLIN 1.6.1920 ZKr (374.1) on cover with 20 Pfg blue horizontal pair, 30 Pfg yellow orange vertical gutter pair, 40 Pfg green olive vertical gutter pair postage stamps issue smelting works and peace pigeon 1920 to Leipzig Gohlis, arrival postmark single circle LEIPZIG-GOHLIS 2.6.20 at back, minimal foxed