Auction Series 257-264 in Zurich Day 4

La Guaira - San Thomas 1870c.: Lithographed, possibly by Rasco, with 1 c. yellow superb unused and of beautiful centering but with minute closed tear at left, ½ r.green unused but off-centre and with one roulette missing, 2 r. blue deep blue unused with trimmed roulettes at left, all three with part or large part og., also a 2 r. blue cancelled in blue. A rare group - ascribed to Lamb & Co. by the exhibitor, less than 20 examples known in total. Certs Holcombe (1988) for ½ r. and 1 r., Philatelic Foundation (1987) for unused 2 r. Facit LG23+LG24+LG25 = unpriced.
Catalogue 261: Stamp Issuing Steamship Companies