Miranda initiates a deep dive into Patek Philippe's chronograph history, focusing on early models without additional complications. This comprehensive overview highlights Patek Philippe's significant, yet often overlooked, contributions to chronograph development, tracing its evolution from the first split-seconds patent in 1902 to iconic references like the 130.

One of the most popular complications in horology is the chronograph, and Patek Philippe chronographs are some of the most sought after in the collector’s world. Every year records are broken at auction, and the lust for them is insatiable.
Whilst Patek Philippe is famed for its calendar complications, minute repeaters and tourbillons its contribution to the development of the chronograph is often overlooked. Patek Philippe has been producing exceptional wrist chronographs since the dawn of the wristwatch. In 1902 Patek Philippe applied for the first ever patent for a split second’s chronograph.
The first chronographs manufactured in the 1920’s were made in tonneau and round Officers style cases. The oldest surviving chronograph dates to 1924 and is a round cased chronograph with an Officer case style hinged back. According to Patek Philippe, this was one of a series of three pieces made in yellow gold. It was monopusher with a 30 minute register and running seconds.
Another beautiful example is this 1928, case no. 292’634. Also featuring a round case with hinged back and wire lugs. The monopusher movement features the calibre 13” with 25 jewels from Victorin Piguet. It was made in just 27 examples.

Also from 1928 is this incredible unique cushion cased chronograph, no. 608’751. Also housing the cal.13” movement. The case gives inspiration to the modern versions 5950A-001.
It was in the latter half of the 1920’s we saw the debut of the ref.130. This famous reference has seen many variations, but the early models from the 20’s featured a single button chronograph. These first models all housed the 13” ebauche. The case style became synonymous with the ref.130 style. These early chronographs are highly desired, especially in steel like this 35mm case no.504’146. The dial featured black enamelled hour markers as well as a pulsation scale. This particular piece was made in 1927, but sold on the 24 March 1937.
Another beautiful example is this example from 1929, also 35mm, in 18kt yellow gold, it features a delightful sector dial with hard black enamel Arabic markers. It also has a hinged back. Again it houses the esteemed cal.13” movement.
In part 2 we explore the first series produced chronographs.
Picture credits:
Phillips auction
Christie’s auction
Sotheby’s acution
About the Patek Philippe Ref. 5950
The Patek Philippe Reference 5950 is a monopusher split-seconds chronograph, a highly complex complication that showcases Patek Philippe's traditional watchmaking expertise. This reference is notable for its cushion-shaped case, drawing inspiration from early 20th-century Patek Philippe chronographs, and its integration of a sophisticated manual-winding movement. It represents a contemporary interpretation of historical designs, appealing to collectors who value both technical prowess and vintage aesthetics. The 5950 stands out in the Patek Philippe collection for its unique combination of a rare complication and a distinctive case form.
The watch features a 37mm cushion-shaped case, crafted from platinum, providing a substantial feel on the wrist. It houses the manual-winding caliber CHR 27-525 PS, a movement known for its slim profile and intricate construction, including a column-wheel mechanism. This caliber offers a power reserve of approximately 48 to 52 hours. The dial is protected by a sapphire crystal, allowing for a clear view of the intricate details. The caseback is also sapphire, revealing the meticulously finished movement.
For collectors, the Reference 5950 holds significance due to its limited production and the complexity of its monopusher split-seconds chronograph function. It appeals to those seeking a high-complication timepiece with a strong historical design lineage. The platinum case and the specific movement further enhance its desirability, positioning it as a notable piece within Patek Philippe's grand complications. Its design echoes earlier Patek Philippe chronographs, making it a bridge between historical and contemporary horology.
Specifications
- Caliber
- CHR 27-525 PS
- Case
- Platinum
- Diameter
- 37 mm
- Dial
- Black
- Water Resist.
- 30 m
- Crystal
- Sapphire
About the Patek Philippe Grand Complications Ref. 5950A-001
The Grand Complications reference 5950A-001 is a split-seconds chronograph introduced in 2010. This particular reference is notable for its use of stainless steel, a material rarely employed by Patek Philippe for its grand complication timepieces, making it a distinctive offering within the brand's high-complication catalog. It represents a focused approach to a specific complication, preceding the introduction of more complex variants like the 5951 which integrates a perpetual calendar.
The watch features a cushion-shaped stainless steel case, housing the manual-winding caliber CHR 27-525 PS. This movement is recognized for its slender profile and the intricate mechanics required for the split-seconds function. The case is fitted with a sapphire crystal on both the front and the display back, allowing for observation of the movement's finishing and operation. The dial is presented in a silver opaline finish, providing a clear backdrop for the chronograph indications.
For collectors, the 5950A-001 holds significance due to its material choice and its dedication to the split-seconds chronograph complication without additional modules. Its limited production in steel distinguishes it from other grand complications typically cased in precious metals. The reference appeals to those who appreciate technical horology and the rarity of steel in Patek Philippe's most complex watches, positioning it as a notable example of contemporary high watchmaking.
Specifications
- Caliber
- CHR 27-525 PS
- Case
- Stainless Steel
- Diameter
- 37mm
- Dial
- Silver Opaline
- Water Resist.
- 30m
- Crystal
- Sapphire