outpost before Moscow, trial proofs in the colours blue-green, violet, dark red, brown and blue, on ungummed paper, imperforated, each as vertical gutter pair. gutters are only from the trial proofs known, obviously were all normal sheet cut up. extremely rare, for any man value photo expertize copy (for the complete sheet) autumn (2007) : "nice single values are very rare. ", Michel estimated 3.600.-