As Mike said, the SA cases are base metal rings with built up 18ct gold around them so they aren't a true solid gold case. A few years back before gold went insane I had a couple of Longines 30L's from the late 50's / early 60's - one original Swiss, one SA recased 18ct. The Swiss had $450 in scrap, the SA had $150 in scrap.
Nice lugs though - kind of like that special edition Philippino Centenary.
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