Patek Philippe 2526 Calatrava Automatic Enamel Dial GUBELIN SIGNED 1st Series (28351)

28351 Patek Philippe Calatrava 2526 Automatic, first self-winding watch made by Patek Philippe, this example is very rare as it is co signed by Gubelin and is accompanied by its original "brick" hand hammered Gay Freres bracelet made especially for Gubelin, the hand bracelet finishing is unique for this reference and was likely requested by someone at Gublin with a strong relationship with the Gay Freres bracelet manufacturer, the 18k yellow gold case is in incredible original condition and has had very little restoration in its life, the entire watch length is 6.85 inches, historically important Patek Philippe caliber 12-600AT movement, 30 jewels, rhodium-plated movement, since this a "first series" dial with the dimples, and is signed above the 6 o clock seconds counter by GUBELIN, the white porcelain enamel dial is in outstanding original condition with no cracks or hairlines, 18K yellow gold applied markers and hands, acrylic crystal, screw down caseback, Excellent Condition with Patek Philippe butterfly box and Archive Papers confirming the date of sale in September 1955. The watch was just completely serviced.

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More about Patek Philippe 2526 Calatrava Automatic Enamel Dial GUBELIN SIGNED 1st Series

This is a vintage 1956 18K yellow gold Patek Philippe Radium Enamel Dial 2526. It has an integral custom 18k yellow gold link Gay Freres bracelet with a deployment clasp (stamped GF, PP, 4/1956), and an acrylic crystal. The screw down winding crown has the PP logo, and there is a screw down solid case back, inside of which is stamped "PATEK PHILIPPE & CO – GENEVE – SWISS," several hallmarks, and a serial number. The 18k guilloche gold rotor has the Patek Philippe seal. The 35.5mm diameter solid two-body case, gently curved lugs, and stepped bezel, are polished. The dial is white enamel in outstanding original condition, with applied gold boat-shaped baton hour indices around a perimeter gold dot minute scale, with the original radium lume. There are gold dauphine hands, and a white running small seconds subsidiary dial with gold markings is at the 6 o'clock position. It's water resistant, and the 11.5mm thick case, dial, and movement are all signed.

This Patek Philippe Radium Enamel Dial 2526 has a mechanical automatic self-winding Patek Philippe caliber 12-600 AT movement that's stamped with the Geneva quality seal. It's rhodium plated with fausses cotes embellishment, and it's constructed with 30 jewels, bi-directional winding, a straight-line lever escapement, and a Gyromax balance adjusted for cold, heat, isochronism and five positions. There is a shock absorber device, an 18K gold guilloche rotor with the Patek Philippe seal, a self-compensating Breguet free-sprung balance spring, and a swan-neck micrometer regulator.

The Patek Philippe Radium Enamel Dial 2526 was the company's first self-winding wristwatch, initially introduced in 1952, ushering in the era of the automatic. This is the first and still one of the very finest automatic wristwatches ever made, and a mid-20th century hallmark. It was produced in a small edition of 580 examples.