1941 Bureau of Education Official Mail

1940 APRIL 22: MANILA to MALOLOS, BULACAN
30.0 x 23.0 cm Large envelope with pairs of  1935  4c Woman & Carabao
and 1938 12c Salt Springs O.B. issues (#O16 and #O32) for 32c
First Class Domestic Rate, 320 grams maximum weight.

SCARCE 1935 and 1938 O.B. COMBINATION FRANKING

1939  JUNE 5: MANILA to MALOLOS, BULACAN
27.0 x 18.0 cm Large envelope with 1931 8c Legaspi Definitive
and 1935 26c x 3 Rice Terraces O.B. (#O8 and #O23) issues for 86c First Class
Domestic Rate at 860 grams maximum weight.

SCARCE MULTIPLE USE OF 26c O.B. ISSUE