Patek Philippe, a gentleman's gold 'Calatrava' wristwatch

Patek Philippe, a gentleman's gold 'Calatrava' wristwatch, the circular white dial with black Roman numerals, to a gold case with hobnail-pattern bezel, quartz movement, on a black Patek Phillipe leather strap, signed dial, case with Swiss import marks and convention mark for 18ct gold, movement number 1.502.050, case number 545.723, model number 3744, case width 3.5cm, travel pouch stamped Patek Philippe and papers