Plate 122375: Top Margin Block of 14

The prefix “F” on the plate number signifies that the plate was “chromed”
to increase the service life of the plate.
1935 DECEMBER 13: BALANGA, BATAAN to MANILA
From the District Engineer, 3-color franking using 2c Rizal, 4c McKinley and 12c Lincoln O.B. issues for proper 18c Single First Class Registered Domestic Rate (2c + 16c Registry Fee), 20 grams maximum weight.