1941 JULY 23: NAGA, CAMARINES SUR to CALOOCAN, RIZAL Province of Camarines Sur official mail postmarked  BICOL / R.P.O. / NORTH.

1941 DECEMBER 18: BATANGAS CIRCULATING 4c Double rated official mail from BALAYAN to BATANGAS, BATANAGS. This being an internal province mail, it is assumed that delivery was made during early World War II period.