It actually hasn't. No one knows where it came from. The results of the testing were inconclusive and show it was scrap steel from somewhere and a big pile of scrap sitting just a short distance away with a Britishsalvage company steeling secrets above all. Also interviews with the people around the wreck and familiar with the salvage stated HAFDASA’s engineer Carlos Ballester Molina was present during part of the salvage.
Only thing that has been debunked is that it was the Graf Spee's armor plate. It is definitely not that. Lots of other steel in a ship however.
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I like the scales and the holster, it holds two magazines which is a plus. It is a bit large however. It can be worn from a shoulder strap which is on it or a belt.
The scales are plastic not wood, they were switched about 1942. They went with the vertical grooves as it was cheaper than checkering. I have been unable to get them off. Very narrow screwdriver blade needed. A lot were exported to the US in the 1960's which explains the lack of an import mark.
Sarco actually has some for sale for $750 and $850 now, from Peron's personal guard.
It is a nice pistol. I like how it feels in the hand. It is slightly heavier than a 1911.