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Reference:pre-daytona-chronographs: Difference between revisions

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Deep hub audit: qualify pre-Daytona chronology and rarity language, remove price leakage, fix footer gallery heading, add collector source
Add verified ref. 2508 data and correct cross-reference guidance
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{{DISPLAYTITLE:Rolex pre-Daytona chronographs}}
{{DISPLAYTITLE:Rolex pre-Daytona chronographs}}
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{{#seo:
|title=Rolex Pre-Daytona Chronographs — 1937–1968 Guide | Rolexopedia
|title=Rolex Pre-Daytona Chronographs — 1935–1968 Guide | Rolexopedia
|description=Rolex chronographs before the Cosmograph Daytona: Antimagnetique, Monoblocco, tonneau Oyster and round-Oyster references leading to the 6238 and overlapping 6239.
|description=Rolex chronographs before the Cosmograph Daytona: Antimagnetique, Monoblocco, tonneau Oyster and round-Oyster references leading to the 6238 and overlapping 6239.
|keywords=Rolex chronograph, Pre-Daytona, Antimagnetique, Monoblocco, Barilotto, 2508, 3525, 3668, 3833, 4099, 4500, 4537, 4767, 5034, 6034, 6234, 6238, Valjoux 23, Valjoux 72, vintage Rolex
|keywords=Rolex chronograph, Pre-Daytona, Antimagnetique, Monoblocco, Barilotto, 2508, 3525, 3668, 3833, 4099, 4500, 4537, 4767, 5034, 6034, 6234, 6238, Valjoux 23, Valjoux 72, vintage Rolex
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== Antimagnetique era (late 1930s to mid-1940s) ==
== Antimagnetique era (mid-1930s to late 1940s) ==


Early references include non-Oyster snap-back chronographs with an “Antimagnetique” dial designation. Catalogue descriptions associate these watches with Valjoux-based two-register movements, but the exact caliber and case details vary by reference. Rolex’s wartime correspondence and later auction records document sales of 3525 chronographs to Allied prisoners of war; that history belongs to the individual watch and surviving archive.
The earliest references here are non-Oyster chronographs. The 2508 has two registers and two pushers; auction catalogues and specialist literature disagree on its movement and case details. Later references added screw-down Oyster cases and their own documented movement fitments. Rolex’s wartime correspondence and later auction records document sales of 3525 chronographs to Allied prisoners of war; that history belongs to the individual watch and surviving archive.


{| class="wikitable" style="width:100%;"
{| class="wikitable" style="width:100%;"
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! Reference !! Production !! Case !! Movement !! Key distinction
! Reference !! Production !! Case !! Movement !! Key distinction
|-
|-
| 2508 || c.1935–1939 || ~32mm round, snap-back, non-Oyster || Cal. 13 (Valjoux 23 base) || Pre-Oyster Antimagnetique chronograph; steel and gold examples are documented in auction records
| [[Reference:2508|2508]] || c.1935–1947 dated examples; endpoints unconfirmed || 35–38mm round, snap-back, non-Oyster || Movement attribution disputed; see article || Two registers and two pushers; oval/olive and rectangular forms are documented; date and diameter overlap
|-
|-
| [[Reference:3525|3525]] || 1939–1945 || ~35mm Monoblocco Oyster, screw-down crown and back; pump pushers || Rolex Cal. 13 (Valjoux 23 VZ base) || One of Rolex’s earliest two-pusher Oyster chronographs; earlier Oyster monopushers existed; one-piece upper case (''Monoblocco'' / ''Barilotto''); the WWII POW reference; Corporal Clive James Nutting's Stalag Luft III watch (case 185,983) was documented as sold "gratis" to Nutting in 1943
| [[Reference:3525|3525]] || 1939–1945 || ~35mm Monoblocco Oyster, screw-down crown and back; pump pushers || Rolex Cal. 13 (Valjoux 23 VZ base) || One of Rolex’s earliest two-pusher Oyster chronographs; earlier Oyster monopushers existed; one-piece upper case (''Monoblocco'' / ''Barilotto''); the WWII POW reference; Corporal Clive James Nutting's Stalag Luft III watch (case 185,983) was documented as sold "gratis" to Nutting in 1943
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! Era !! Movement !! Case construction !! Pushers !! References
! Era !! Movement !! Case construction !! Pushers !! References
|-
|-
| Pre-Oyster (mid-1930s) || Cal. 13 (Valjoux 23) || Snap-back, soft-iron Antimagnetique inner case || Pump || 2508
| Pre-Oyster (1930s–40s) || Published descriptions conflict: 13-ligne or 14-ligne; Valjoux 22, V23 or VZ || Round snap-back, non-Oyster; no inner-case specification established here || Two; oval/olive or rectangular || [[Reference:2508|2508]]
|-
|-
| Monoblocco Oyster (1939–1946) || Rolex Cal. 13 (Valjoux 23 VZ) || One-piece upper case, screw-down caseback || Pump || 3525, 3668, 3833
| Monoblocco Oyster (1939–1946) || Rolex Cal. 13 (Valjoux 23 VZ) || One-piece upper case, screw-down caseback || Pump || 3525, 3668, 3833
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