Impossible to find.
De Grisogono  STEEL clasp deployment buckle 17-mm VERY RARE. Authentic. See pictures for sizes. See my other items for sale. AUTHENTIC. Made in Switzerland.

I do combine shipping if you buy a few items. 

Zero or less than 10 feedback buyers please contact me first. 
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Check my other items for sale - a lot of high brands sunglasses, eyeglasses frames, top brands watches, jewelry.