1910 Philippine Constabulary Postal Envelope
1910 APRIL 18: MANILA CIRCULATING
2c Rizal green on blue postal envelope (U38 / UPSS OB28) with
Philippine Constabulary corner card.

This one is a rarity. Possibly the second used example and the EARLIEST DOCUMENTED USAGE of the issue (the first reported used on March 25, 1913). This one used three years earlier, postmarked APRIL 18, 1910.

The 4c (UPSS #OB29) issue is also quite scarce in used condition and I believe there are less than 10 of them. 

By illustrating the covers on this site I am officially documenting their date of usage.


RARE IN USED CONDITION

ebay US$ 482.00