That serial number was issued by the 2nd service command late in WWII to a draftee.
(AAF should stand for Army Air Force)
Second Service/Corps Area (New Jersey-Delaware-New York) HQ=Governors Island, N.Y.
Remark 2: due to the enormous increase in numbers of service men, the War Department was obliged to introduce additional series of digits - furthermore some Service Commands inducted more than 1,000,000 men ! Consequently, the W.D. launched a new series of digits for DRAFTEES starting with 4 as first digit, immediately followed by the second digit (indicating Corps Area/Service Command); as a result of this, the Second Service Command received a new series starting from 42,000,000 > 42,999,999 whereas the Fourth Service Command was given another series starting from 44,000,000 > 44,999,999 ! This explains the introduction of series starting with digit 4 . Let's take a serviceman with ASN 42076794 - the first digit 4 points to a new series introduced for draftees called until January 43, while digit 2 indicates the man originates from the Second Service Command/Corps Area