Originally Posted by 52Carl
I need some historical verification what they were plated with before I go to this extent to restore my hinges.
OK Mr. Doubting Thomas ...er Carl. wink You could do a test with hydrochloric acid on the remaining plating on yours. It would tell you that they're very likely zinc plated. I don't think you'll be able to find any historical verification. It was 70 some years ago.

Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.