I got this in the mail today. One little Christmas present to myself.  Found it on eBay. Really lovely I hope you will agree.

I have read that the stamp was issued on 12 August, yet this cover is showing first day of issue as 19 August.  Any knowledgeable readers who can explain that to me?

And some trivia for you. Domestic U.S. Air Mail was established as a new class of mail service by the United States Post Office Department (POD) on May 15, 1918, with the inauguration of the Washington–Philadelphia–New York route. Special postage stamps were issued for use with this service.  Domestic air mail became obsolete in 1975, and international air mail in 1995, when the USPS began transporting First Class mail by air on a routine basis.

Best wishes.. Michael