The pictures on the left are from a Sotheby Parke catalog from 1979 and the selling prices at auction. Very plain clasp. Some dark stones but otherwise in excellent condition. The buckle is part of the safety clasp. It took many months of working on this and re-setting stones with Swarovski's to get the proper sparkle.
Shows wear on the back side.
I've seen similar clasps and spacers in the very expensive bracelets in the auction catalogs. That's why I laid my bracelet across the catalog on the picture on the left. The one on the right, one of my original designs, is mint condition vintage findings with Czech crystal in emerald green.