A lady’s 18ct gold automatic calendar wristwatch, by Blanc Pain, the signed circular white dial with applied gilt Arabic numerals, centre sweep seconds hand and date aperture at 3 o’clock, automatic movement, yellow gold case signed and numbered ‘1769’, with European convention mark, polished stepped bezel and lugs, to a black leather strap, with yellow gold buckle, stamped ‘750’, dial diameter 20mm. £500-£700