1926 MAY 13: APARRI to MANILA

AAMC #11 with 2,514 letters carried.

Upon inspection there is no doubt in my mind that this is a COMMERCIAL FLOWN COVER and I believe those that collect Philippine flights or the Philippines in general only realized this when the bidder was over. 

So far I have documented 4 commercial covers out of the more than 2,500 letters carried on this pioneer flight and for only $27.66 (eBay), this one is very cheap.