This is a TA French threaded bottom bracket off a weird 1980s Motobecane mountain bike. Came with a 175mm TA triple crank. I'm curious as to what 'P FG' means--I poked around the web and found a guide to TA BB markings (Specialites T.A. - bottom brackets), but this wasn't on it. Any help is much appreciated.

Photos: https://imgur.com/gallery/vbEcp