An 18k heavy Mans Tiff is a Massive score! Depending on the weight...and it looks quite large...guessing 14gr at least....Thats some pretty big melt money! Let alone the Tiff pedigree...Nice find indeed! Probably pushing $800 or more there easy...
Weigh it and check the melt value on Goldcalc.com...take a look at similar listed rings on Ebay...That kind of find makes a guys year there...