Use of 1931 Imperforate Issue on Outbound Official Mail

1933 JUNE 17: MANILA to CHICAGO
Bureau of Posts official mail franked with 2c Rizal, 4c McKinley single and two blocks of 4 of
the 1931 Imperforate Issue. Backstamped CHICAGO / JUL 13.

Proper 38c franking for 18c Triple Outbound Rate, 90 grams maximum weight 
and 20c Registry Fee.

VERY SCARCE OFFICIAL USE OF THE 1931 IMPERFORATE ISSUE
Dr. Tommy Sim Collection