![Patek Philippe Ref. 5235/50R Annual Calendar Regulator](https://uploads-ssl.webflow.com/5880c2457f92b892427ba1ee/5c90f1ec016ee6bb9503ddec_principala.jpg)
Patek Philippe Ref. 5235/50R Annual Calendar Regulator
At Baselworld 2019, this model is being presented in a new version featuring a rose-gold case with a two-tone dial in graphite black graced with a vertical satin finish.
![Patek Philippe Ref. 5235/50R Annual Calendar Regulator](https://uploads-ssl.webflow.com/5880c2457f92b892427ba1ee/5c90f21de6a576015f4e24fa_continut2.jpg)
Patek Philippe revisits the unique style of its Annual Calendar Regulator by presenting it in rose gold, paired with a two-tone dial in graphite and ebony-black with a vertical satin finish. The caliber 31-260 REG QA self-winding movement, designed specially for this model, is notable for 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 New Patek Philippe Ref. 5235/50R Annual Calendar Regulator](https://uploads-ssl.webflow.com/5880c2457f92b892427ba1ee/5c90f23c0920b645542cb49e_continut1.jpg)
Patek Philippe Ref. 5235/50R Annual Calendar Regulator
Technical specifications:
Self-winding mechanical movement. Caliber 31-260 REG QA. Annual Calendar. Regulator-style display: hour and seconds subdials, sweep minutes. Day, date, month in apertures. Two-tone graphite and ebony black, vertical satin finish, white transfer-printed. Alligator leather with square scales, hand-stitched, matte black. Prong buckle. Rose gold. Sapphire-crystal case back. Water resistant to 30 m. Diameter: 40.5 mm. Height: 10 mm.
![Patek Philippe Caliber 31-260 REG QA](https://uploads-ssl.webflow.com/5880c2457f92b892427ba1ee/5c90f253cc7b93b171f3c09e_continut3.jpg)
Patek Philippe Caliber 31-260 REG QA Specifications:
Self-Winding
Annual Calendar. Regulator-style display: hour and seconds subdials, sweep minutes hand. Diameter: 33 mm. Height: 5.08 mm. Parts: 313. Jewels: 31. Power reserve: Min. 38 hours - max. 48 hours. 22K gold off-center mini-rotor. Escapement: Pulsomax. Balance: Gyromax. Vibrations/hour: 23 040. Balance spring: Spiromax. Hallmark: Patek Philippe Seal.
![Patek Philippe Caliber 31-260 REG QA](https://uploads-ssl.webflow.com/5880c2457f92b892427ba1ee/5c90f2876006b51e083c17e9_continut4.jpg)
![Patek Philippe Ref. 5235R Movement](https://uploads-ssl.webflow.com/5880c2457f92b892427ba1ee/5c90f299340aa97baa5805b4_continut7.jpg)
![Patek Philippe Ref. 5235/50R Annual Calendar Regulator](https://uploads-ssl.webflow.com/5880c2457f92b892427ba1ee/5c90f2c26065cbc04e4c8dfd_continut6.jpg)
The price for the Patek Philippe Ref. 5235/50R Annual Calendar Regulator is US$51,830, or CHF 45,700.