BPM Machine Postmark ‐ 1954
Beginning in 1953, senders were instructed to not include the B.P.M. number on letters and the numbers were dropped from postmarks.
When the B.P.M. number was displayed together with a unit‐specific Secteur Postal (S.P.) number, troop locations and movements could be deciphered by the enemy.
The postmark slogan on this cover, dated 23 August 1954, translates as, “Indication of the BPM number or a geographical location is prohibited in military addresses”.
The cover was sent from a member of the 22nd Brigade at the Infantry School in Thu Duc.