About UC-61J there was the USAAF number 42-107276 being ex-civilian Fairchild 24-C8F registered NC16815, impressed by the USAAF.
Forwader too!
(I am curently flying a F24R / UC61K number c/n 998 ex USAAF 1944 Forwarder delivered to RAF as Argus III coded KK380, then return to civilian life with "Louis Breguet" himself in 1948...flying until today!!! (french collector register F-AZCI....please have a look at http://j.courtot.free.fr/
we are still flying in french airshows every year!
you're welcome,