The zipper pull with the loop does look very different when compared to a ball chain pull. It is vintage correct though.
Looks good.One more thing, while over at the Cockpit U.S.A. website, I ran across a military jacket that combines elements of both the halfbelt and the G1. It has a vintage straight collar, though not spear point, its very close, and the chest pockets of the G1. Its a interesting combination that obviously can be dressed up or down:
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