FRAUENBURG (Latvia): 10 kopeck brown & blue, clear at base, otherwise good to large margins, used with pen cross on lettersheet, with reverse side boxed dispatch Mark "FRAUENBURG" with manuscript date "27 August 58", to Riga. Some minor staining in the envelope only. A fine and rare No.1 entire; just one further recorded from this tiny village.  2 certificate Buchsbayew (2018)