used 1850 "Winterthur" 2½Rp. black and red-brown, a scarce vertical pair with very good margins on all sides, crisply cancelled by two strikes of the unframed "P.P.", small filled - in thinning at upper right. Very fine and most attractive. Nussbaum and Fulius Certificates. Z. 12, S.F. 12,500 +. Photo