1919 "Postgebiet Ober Ost Grodno", surcharged 40gr and overprinted "Poczta Polska" on Russia imperforate 1k orange, block of four, bottom stamps surcharge inverted, upper left stamp "V.P. Grodno" upright, upper right stamp overprinted counter clock wise 90 degrees, n.h., but each stamp initialed "N" (Lt. Bauer), minor wrinkles, fresh and v.f., with 2020 Tobias Huylmans certificate ("a very rare and according to my records the only known tete-beche multiple") (Image)

Est.$9,000