This is the large version of the Cartier Paris Ceinture in 18kt yellow gold 31mm. from the mid-1970’s.
The watch is powered with an automatic ETA movement.
The yellow gold stepped case with its octagonal shape has an unusual protected crown or “remontoir imperdable”.
The white octagonal dial has classic Cartier black roman numerals.
This great looking watch comes on a pink strap with an 18k yellow gold Cartier deployment clasp.