Patek Philippe Perpetual Calendar 699/3

Patek Philippe. An Extremly Rare, Important And Probably Unique 18k Gold, Two Train, Minute Repeating Through The Crown Openface Keyless Lever Perpetual Calendar Watch With Moon Phases Signed Patek Philippe, Geneve, Retailed by Tiffany & Co., Ref. 699/3, Movement No. 137'976, Case No. 691'721, Manufactured in 1907, Encased in 1956 Cal. 18''' nickel-finished two train lever movement, 33 jewels, bi-metallic compensation balance, micrometer regulator, minute repeating on two gongs activated through a button in the crown, silvered matte dial, applied gold baton numerals, black enamel outer minute divisions, triple apertures for day, date and month, subsidiary seconds combined with phases of the moon, plain circular case, snap on back, case, dial and movement signed by maker, dial signed by retailer 50mm diam.