It may have not been heated at all. If the intent was just to make it inoperable some after WW2 just poured hot solder into the firing pin hole and let it cool. If the surfaces were not clean and oil free, the solder would just cool in place but would not transfer damaging heat to the slide. I examined a Star Model B 9mm that was disabled just that way by the veteran that brought it home. I would test the situation by heating a nail to really red hot and touching the solder. If it melts at all with a simple touch it is soft solder and this slide can be easily saved without damage IMHO. If it doesn't melt in this test then the only way to safely salvage the slide would be to remachine the FP hole. Just my $0.02. (Again...  )
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regards, -John S
"...We hold these truths to be self-evident that ALL men are created EQUAL and are endowed by their Creator with certain UNALIENABLE rights, and among these are life, LIBERTY, and the pursuit of happiness..."
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