It has a crown filter too. 

Cool grouping. Did you get anything else from the estate?

Nice find!

Forgot, it is an M557 PD fuze.    https://www.bulletpicker.com/pd_-m557.html

Not original, should be anodized black or chromate goldish in color. But, it is complete w/ booster, not commonly found. Leave it as is as the finish under it appears to not be correct either.   Write the complete lettering found engraved on it, that will have clues as to its purpose ( unloaded factory reject, demilled, training fuze, etc…)

I think you are correct.  Thank you for the help.

I was looking today on ebay and I saw a 1958 Camillus !!! A little more reasonable price. Buy it now price of $50.00.................... I got it. This one is actually not broken ! 🤣

Remembering Marlin on this Memorial Day weekend.     

Seems to be a lot of sub buckles up on the block lately. Next up a named buckle, USS New York City , SSN-696 , EM1 (SS) Reece    

If the engraving still their white model paint will fill the engraved US Navy, then use a paper towel to wipe the excess it won't wipe the white paint that's in the engraving and let dry. And Florida has a lot of clockmakers a local guy could service it cheaper. There one watchmaker who lives in Florida who use to work for Chelsea who a lot of Chelsea collectors use since he is cheaper never used him before did ask for a quote once from him.