Signed Tiffany & Co. 18k yellow gold wave hinged bangle bracelet. 

A versions with a slightly larger width is also available. 

ID#: BRA511

Metal: 18k yellow gold 

Dimensions: 2 3/8 inch inside diameter

Bangle Width: 5.22mm 

Weight: 15.67g

Markings: '750', 'Tiffany & Co'