1941 MARCH 7: MANILA to MAMBAJAO, ORIENTAL MISAMIS Bureau of Internal Revenue official mail bearing 6c x 3 La Filipina with Type I spacing and 2c Rizal O.B. issues for proper 20c Double Domestic Registered Rate (4c Postage + 16c Registry Fee).

1941 FEBRUARY 27: SAN JUAN, BATANGAS to MANILA Municipal official mail franked with 6c La Filipina O.B. with Type II spacing for proper 6c Triple Domestic Rate, 60 grams maximum weight.