Another cool piece, was not checking G1's fir a while.... I assume that it is Burjac (some details points to this assumption) but not 100% sure.... Super cool piece and such a hide condition! Looks like someone tried to figure out what was the manufacturer 
picclick.com
VTG 40s Fried-Osterman M422A WW2 Flight Jacket USN Leather Bomber Sz 40 • $349.99
VTG 40S FRIED-OSTERMAN M422A WW2 Flight Jacket USN Leather Bomber Sz 40 - $349.99. FOR SALE! 204844232949
