Use of 1931 Imperforate Issue on Domestic Official Mail

1933 AUGUST 5: PASIG to PASAY, RIZAL
Court of First Instance official mail franked with pair of 4c Mckinley and 8c Legaspi single
1931 imperforate issues and 4c Definitive, all with handstamped purple "O.B."
Backstamped MANILA on the same day and PASAY, RIZAL / AUG 7.

Proper 20c franking for 4c Double Domestic Rate, 40 grams maximum weight 
and 16c Registry Fee.

VERY SCARCE OFFICIAL USE

Dr. Tommy Sim Collection