Three color (Rose, White, and Yellow) 18k gold in a solid band about 3.5mm wide weighing about 3.6g (0.125oz). Trinity Vendôme design copyright 1988, serial number N57553 in excellent used condition. In addition to the brand, copyright, and serial information on the inside band, maker’s marks are stamped into the rose gold exterior band. Note: the interior band shows size 50, but it was resized at Cartier to size 53, as shown. The only visible sign of this is a small area on the inside band in yellow gold. The exterior band was matched in tri-tone. Also, the box shown is not the original box & is not Cartier