Not sure, but late 90s through 2010s and I never once saw a Fighter - Strike / Fighter aircrew with regular patches on their leather jacket.So for history sake, when did people start only putting leather patches on the G-1 instead of embroidered patches?
I was flying through Whidbey to AK once and saw a P-3 dude with some on his, but that is the only example I can think of.