C174 VF Attractive sunken die deluxe trial color proof for 50fr airmail, multicolored incl golden (sunset) tint to sky on Kaiser's Yacht stamp & borders at sides, signed by artist & embossed seal at LL; beautiful engraved German postal seal & 5 mark stamp-on-stamp design; unique proof w/ these colors (slightly diff from the one offered in a previous sale), produced for the Prince of Monaco collection; couple minor stray ink spots, VF (ex-Sismondo) (Image)

Est. $140-180 SE