A mother-of-pearl and diamond-set 'Five Time Zone' quartz wristwatch, by Jacob & Co.
The mother-of-pearl circular dial with Arabic quarters, date aperture, sweep centre seconds and four pavé diamond inset clover subsidiary dials for four time zones, to a brilliant-cut diamond bezel, case 46mm wide
Dial, case and buckle signed J & Co., case no. A4370
A mother-of-pearl and diamond-set 'Five Time Zone' quartz wristwatch, by Jacob & Co.
The mother-of-pearl circular dial with Arabic quarters, date aperture, sweep centre seconds and four pavé diamond inset clover subsidiary dials for four time zones, to a brilliant-cut diamond bezel, case 46mm wide
Dial, case and buckle signed J & Co., case no. A4370