MEF British WWI military mail in Egypt: front 5 NO 1915 stampless (OAS) civilian stationary cv ex ...

MEF British WWI military mail in Egypt: front 5 NO 1915 stampless (OAS) civilian stationary cv ex APO SZ 9 (KANTARA?) to CAIRO, tied by unrecorded SC single dateline pmk (similar to APO SZ 19 Proud-D1, which it predates by 5 months) 3 months before est. of this APO is recorded in Proud & Firebrace; endorsed by officer & passed censor; f/s same day ALEXANDRIA ABU QIR (TPO) transit. A discovery piece.