Aircraft REMOVE BEFORE FLIGHT Flag Warning Red - Possibly US Military Plane

Description

From huge military estate sale.
I'm not an expert in this field, but from the looks of other military items I acquired,
it appears to be authentic.
Good condition.
Metal plug piece is marked "US".
Flag is attached with metal wire.
Used, Some scuffs and scratches.
Please see my other vintage military and additional collectibles for sale.
Thanks.