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I've been wondering about this for a long time, and figured this forum might be the right place to ask.
What exactly was the basemetal used in World War II A-11 watch cases?
I have two examples of WWII A-11 cases in my collection: one made by Star, and one made by Keystone. The Keystone case is made of a metal that almost looks like brass, but is too subdued. I have heard that cases were made of some kind of nickel-alloy. The screw on back appears to be a different metal, possibly stainless, as it did not corrode like the rest of the case.
So, what were WWII A-11 cases made of, cupro-nickel? German silver with high copper content?
Also, what were the case backs made of?
Thanks, hope you all can shed some light on this!
|IHC Member 1101|
As David Abbe once discribed it:
Thanks for the answer, that makes a lot of sense! My A-11 case looks like brass under the plating, but when scraped in an un-noticeable place reveals a more silverish color. The copper could explain the brassy look old tarnished and corroded cases assume over time.
Any idea of the amounts of the different metals used? I would imagine that Zinc, Aluminum, and Copper, in that order, comprised the greater parts.
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