In 2011 Patek Philippe endowed its patented Annual Calendar mechanism with a regulator-style display featuring a sweep minute-hand and subsidiary dials for the hours and seconds at 12 o’clock and 6 o’clock respectively.
Today, the manufacture has presented a new version of its Annual Calendar Regulator in rose gold with two-tone dial in graphite and ebony-black with a vertical satin finish and white transfer-printed indications. This original design is enriched by the rose-gold baton-style hands and with three railway-track scales, one each for the main dial and the subsidiary hour and seconds dials. The Annual Calendar displays the day, the month and the date in three apertures, automatically taking account of months of 30 and 31 days. It therefore requires correction only once a year, on March 1st.
The caliber 31-260 REG QA self-winding movement, developed for this model, is notable for its frequency of 23,040 semi-oscillations per hour (3.2 Hz) and its high-tech regulator incorporating a Pulsomax escapement and a Spiromax balance spring in Silinvar – both developed by the “Patek Philippe Advanced Research” department. The minirotor in 22K gold adorned with circular Geneva striping, together with all the other finely decorated parts, may be admired through the sapphire-crystal case back.
The only watch in the Patek Philippe collection featuring a regulator- style display, the new Ref. 5235/50R-001 in rose gold is combined with a alligator matte black strap with large square scales. (Price €.47.000)