Rolexopedia

Rolex Oyster Chronograph 3525


Pre-Daytona chronographs → 3525

Rolex 3525 Monoblocco chronograph
Rolex Oyster chronograph reference 3525.

Auctioneers often call the 3525 Rolex’s first chronograph in an Oyster case. That description usually refers to the two-pusher branch: earlier Oyster-cased monopushers, refs. 3346 and 3462, came first, according to Colin White’s The Vintage Rolex Field Manual. The 3525 is a two-pusher, two-register watch, made in steel and gold variants. Its upper case is one piece; the screw-down back is separate. Auction catalogues place examples from around 1939 to the mid-1940s, but do not establish a complete production span.

Core facts

detail value
reference 3525
line Oyster chronograph; pre-Daytona
documented dates Examples catalogued from circa 1940 to circa 1945; factory start and end dates are not established here
case About 35 mm in cited auction descriptions; one-piece upper case and screw-down back
materials Stainless steel, pink gold, yellow gold and steel/gold examples are catalogued
movement Rolex Cal. 13 is associated with a Valjoux 23-family movement; catalogue descriptions vary in detail
display Two registers and central chronograph seconds; individual catalogues describe different dial scales and details
pushers Round pump pushers; they do not screw down
collector term “Monoblocco,” for the one-piece upper case; “Barilotto” appears in collector writing but is less consistently sourced

Where it sits in the line

Auction houses describe the 3525 as the first Rolex chronograph fitted in a waterproof Oyster case. The claim needs a qualifier: the earlier Centregraph refs. 3346 and 3462 were Oyster-cased monopusher chronographs, as listed in Colin White’s The Vintage Rolex Field Manual. The 3525 belongs to the later two-pusher, two-register branch. “First two-pusher Oyster chronograph” is a safer short description than “first Oyster chronograph.”

The later reference 6034 is not the first to use screw-down pushers. It has pump pushers like the 3525; Rolex introduced screw-down chronograph pushers on the Daytona ref. 6240 in 1965. The 3525’s crown and caseback screw down, while the chronograph buttons remain ordinary round pushers.

Case and crown

Sotheby’s 2020 catalogue describes the upper case, bezel and lugs as one piece, with a separate screw-down caseback. That construction is the source of the collector name “Monoblocco.” Auction catalogues give a diameter of 35 mm for several examples. Those measurements belong to the listed watches; they do not establish one exact dimension for every case.

The Nutting and Brownlee catalogues describe round-button pushers. Neither source describes screw-down pushers. A crown that screws into the case and a screw-down back are part of the Oyster arrangement; they should not be conflated with the chronograph buttons.

Movement and display

Auction descriptions connect the 3525 with Rolex Cal. 13 and the Valjoux 23 family. Antiquorum’s Nutting catalogue lists a 13-ligne, 17-jewel movement; Sotheby’s 2020 lot gives manual winding and 17 jewels without naming the caliber. The Brownlee catalogue names Cal. 13. Taken together, these support the Cal. 13 / Valjoux 23-family attribution, while the exact suffix and finishing should be checked against the movement in a specific watch.

The cited watches have two subsidiary registers and a central chronograph hand. The Nutting catalogue describes subsidiary seconds and a 30-minute register, plus tachometer and telemeter scales. Other catalogue records describe different dial layouts or omit scale details. Do not treat one auction description as a complete dial specification for the reference.

Dial and case variants

The surviving catalogue sample includes silvered, black and pink dials on steel and gold watches. Sotheby’s 2019 steel example is described as black gilt; its 2020 steel example has a silvered dial. Antiquorum’s 1940 pink-gold Mondani example has a matte pink dial. This small sample does not establish which dial was most common, metal-to-dial pairings across the full run, or a premium for tropical examples.

 
Dial and case profile.

Wartime orders

Rolex allowed some prisoners of war to order watches and defer payment until after the war. Antiquorum’s 2007 Nutting lot lists a receipt dated 8 July 1943, an order acknowledgement, a dispatch note, a guarantee and correspondence with Hans Wilsdorf. The catalogue says the watch was “sold gratis”; a 1948 letter in the archive gives the balance as £15 12s 6d.

Nutting was a Royal Corps of Signals corporal held at Stalag Luft III. The catalogue records that he ordered the watch in March 1943 and kept papers and photographs from the camp. The watch is associated with the Great Escape because it was at the camp before the March 1944 breakout; no cited document shows that Nutting used its chronograph to time the escape. The archived catalogue gives an estimate of CHF 130,000–160,000 and shows no hammer price; the often-circulated £66,000 result is unsupported by that record.

Antiquorum’s 2023 catalogue documents a second example, case 185985, delivered to USAAF first lieutenant Leon W. Brownlee, who was held at Stalag VII-A. Phillips has published a separate account of RAF officer Douglas S. Dickins and a 3525. These are individual provenance records; they do not establish the number of watches Rolex sent to camps or a complete “POW” production variant.

Serial numbers and dating

Sotheby’s 2020 catalogue divides its examples into two case-marking groups: an earlier series with reference and serial on the outside of the caseback, and a later series with the reference inside and the serial between the lugs. It dates those groups broadly to 1939–42 and 1942–46. These are auction-house dating conventions. A serial number alone does not establish when a watch was made or delivered; compare the markings and original paperwork on the specific example. See the serial-number guide.

Auction record

Selected catalogue entries. Estimates are not results; where a public result is unavailable, it is stated as such.

Venue and date Lot / case Catalogue description Estimate or result
Antiquorum, Geneva, 13 May 2007 311 / 185983 Nutting watch; steel; 17-jewel movement; original receipt, guarantee and Wilsdorf correspondence Estimate CHF 130,000–160,000; result not shown on archived page
Antiquorum, Geneva, 14 May 2006 108 / 147854 Pink gold, circa 1940; Mondani collection Result not recorded here
Sotheby’s, 2019 183 / 186144 Steel, circa 1942; black-gilt dial; rivet bracelet described in the catalogue Estimate USD 12,000–18,000; result not recorded here
Sotheby’s, 2020 393 / 372822 Steel, circa 1945; silvered dial; 35 mm; 17 jewels Estimate CHF 20,000–30,000; result not shown
Antiquorum, Geneva, 15 May 2023 319 / 185985 Brownlee watch; steel; circa 1941; Cal. 13; 35 mm Estimate CHF 60,000–100,000; result not recorded here

This is a small, selected set of catalogue records, not a census or a current price guide. Auction descriptions and dating are attributed to the sale house.

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    Steel 3525, front view
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    Dial and case profile

Sources

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