Description
1918(Dec 23) OHMS printed stampless env to Cairo cancelled APO SZ10 d/s & w/provisional registration R/47 label modified to 947 in manu & w/unframed SZ10 h/s in black inserted w/faint boxed No 5 Fighting School/Royal Air Force/Central Registry h/s ……Similar to Firebrace RFC 32 but Central Registry for Orderly Room..