Diginut - I've seen very few 10k Pulsars and the occasional knowledgable ebay seller will really crow about how rare a 10k piece is.... Seems to me the 14k gold filled was the vast majority, maybe 80-90% of the ones that were gold in any fashion, the rest in 10k gold-fill, and I'd agree, some tiny number like 1-3% were made in solid.
I've stripped one batch of gold-filled items and plan for another - I blast the cases with aluminum oxide grit -several times faster cut/more abrasive) than silica sand. The gold is seperated from the sand.
Nothing wrong with a batch of gold scrap that is of an odd percentage(assay) - they just add gold to bring it up or add the fill metal to bring it down. Since 18k is as high as you generally want to go for jewelry and such, the 25% that isn't gold give the smelter plenty of wiggle room.
I just melted a solid 14k P2 that was banged beyond repair,yesterday. I've melted a number of watches and coins that were crap over the years. You put the blobs in a container and wait until prices are good or you need the money. At current prices a 14k P2 case, minus the magnets, glass,etc. still nets you almost $300 in gold scrap. BTW - gold is soft, but you will never melt it with a propane torch,even MAPP gas or propane with oxygen injection will struggle. Acetylene is what you need.....actually quite cheap if you have a larger tank.

Anyone who buys and sells watches or jewelry should be tossing anything gold filled or even just plated, into a bucket for eventual scrapping.
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