Jerusalem O.E.T. numbered censorship cover double rarity/discovery piece: Sept 1919 registered cover from ZARAGOZA Spain to JERUSALEM whose franking since removed, backstamped 14 SEP 19 MADRID & 29 IX 19 ALEXANDRIA transits - here opened by Egypt. Civil censor & resealed with FB-CCL4aii label and tied front/back by undocumented black oval "O.E.T. No 4 CENSORSHIP" cachet (extremely rare as only 4 other such cachets known but not this number - per Firebrace) - this possibly added in Sinai or Palestine (as Egypt not part of "Occupied Enemy Territory"); backstamped 4 OC 19 arrival using undocumented OETA EEF [JERUSALEM] postmark note right-tilting position of "A" over index letter, not as in Sacher); opened at top, few peripheral tears near top.
Product Tags: Spanish, Mandatory Palestinian, Egyptian, Philately - Postal Covers, Postmarks & Postal Markings - Mandate and Postal History from Spain, Palestine Mandate, Egypt, and from OETA South (Palestine), 20th Century, 1910s, 1919-1923 3rd Aliya, which are Philately - significant cachets & postal markings, Philately - Censored Mail, Unique/Discovery Piece, Philately - uncatalogued/undocumented varieties