cover 10pa. brown (perf. 12x9½), a very rare horizontal pair and single affixed to 1873 (c.) envelope (slightly trimmed at top) to Vienna and cancelled by single "BEOGRAD" (10.2) c.d.s., framed "AFFRAN INSUFF." h.s. adjacent (the rate to Austria at the time being 35pa.), reverse with neat red seal and thimble arrival c.d.s. in red; a superb and unique item. Signed Richter. M.12ID. Photo