1935 Rizal No Period After "B" Error Cover

Scott #O15a, 2c Rizal rose "O.B." with no period after "B" error,
partial BALIWAG / BULACAN / JUN 27 1936 postmark
to MALOLOS, BULACAN.

Genuine error on cover. Light trace ink smudge at right of "B" caused by cds device.