I found this part, copied and sent it to myself -
USAF Serial Number Search Results
37-458 ... 37-634
Douglas B-18A
MSN 2458/2634
549 W/o Jun 23, 1942 at Nome, AK
551 converted to B-18B. With 59th BS, w/o in Caribbean area
Feb 23, 1943.
552 (MSN 2552) became N66014 then HK-519.
553 W/o...