Light Olive Green
Shipped to Manila September 1, 1938: 357,000

Plate 129928: Top Margin Block of 6
 VERTICAL SPACING BETWEEN O.B. and COMMONWEALTH

 Type I -- 7.00 mm

Type II -- 7.6 mm
1941 JUNE 30: MANILA to CONNECTICUT
Government School of Nursing official mail franked with 20c x 5 Juan dela Cruz Type II O.B. issues mixed with 1p x 2 Moro Vinta Airs for proper, as endorsed,3 pesos Triple Clipper Air Mail Rate to the U.S., 45 grams maximum weight.

Extremely Scarce Multiple use of 20c O.B. Issue