6, 1893 40pa on ?d Vermilion, two singles tied by "BRITISH POST OFFICE/ CONSTANTINOPLE/ B/ FEB 28 93" cancels on registered cover to Cairo, backstamped Alexandrie and Caire, some separation along a heavy horizontal crease (not affecting stamps), Fine and rare; 1968 RPS certificate (SG7)

CV. 300-400

1908 Cover to Canal Zone,Stamboul JU 10 1908 postmarks ties ½d strip of three and 2pi stamps (Scott 14, 15) to registered envelope addressed to Ancon Canal Zone, Stamboul and New York registry labels at top, Very Fine.

CV. 150-200

1910 Cover Salonica to Austria, Salonica MR 14 10 postmark ties 1sh and 5pi issues (Scott 24, 31) to registered envelope, addressed to Vienna Austria, Salonica registry label at upper left, Very Fine.

CV. 150-200

1911 Cover Constantinople to Belgium, AP 4 1911 postmarks tie Scott 10-12, 31, 34 to over-franked registered envelope, addressed to Brusselles Belgium, Constantinople registry label at lower left, Very Fine, scarce high values on cover, 

CV. 200-250

1923 Cover Constantinople to Egypt, 24 SP 1923 postmarks tie 1921 30pa-180pi Surcharges (Scott 55-64) to over franked registered envelope, addressed to Alexandria Egypt, BPO Constantinople registry label at center, no back flap, Fine.

CV. 150-200