on piece Two used examples on small pieces, one cancelled by barred oval "C" and "BRITISH POST OFFICE/CONSTANTINOPLE" c.d.s. (25.2), the other cancelled by "BRITISH POST OFFICE/STAMBOUL" c.d.s. (28.2), fine. Brandon (1979) and B.P.A. (1987) Certificates respectively. S.G. 7, £200