1949 20c Official

The 20c denomination of the Republic Series was the final value of the set overprinted "O.B."  The stamp was issued on July 4, 1949, the third anniversary of  the Republic.

Press Bulletin June 9, 1949

The last of the O.B. series, or the issue that completes this series, is the 20-centavo Mayon Volcano, re brown, overprinted "O.B." in black, which will have its first day of issue on July 4, 1949. As this day falls on the 3rd Anniversary of the Republic, philatelic covers and souvenirs bearing the new stamp shall be impressed with a special cachet in addition to the usual first day canceller...

First Day of Issue Cachet

First Day Covers