Reference:3132: Difference between revisions
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Deep correctness and anti-slop audit: corrected case-material contradiction, qualified movement/case conflicts, removed unsupported market and production claims, corrected image context, and added gallery. |
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<span id="core-facts"></span> | <span id="core-facts"></span> | ||
== Core facts == | ==Core facts== | ||
{| class="wikitable rp-facts" | {| class="wikitable rp-facts" | ||
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|- | |- | ||
| bezel | | bezel | ||
| smooth or engine-turned | | smooth or engine-turned; fitment must be checked on the individual case | ||
|- | |- | ||
| crystal | | crystal | ||
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|- | |- | ||
| case materials | | case materials | ||
| | | documented stainless steel, steel and gold, 14K and 18K gold examples | ||
|} | |} | ||
<span id="where-it-sits-in-the-line"></span> | <span id="where-it-sits-in-the-line"></span> | ||
== Where it sits in the line == | == Where it sits in the line == | ||
The 3132 is best read alongside the 3131. Both belong to the later Bubbleback references associated with a two-piece Oyster case, but the 3131 is documented with subsidiary seconds and the 3132 is generally described with centre seconds. Later Bubbleback references also use both layouts. The surviving record does not prove a single launch price, a complete shared-materials list, or an unbroken technical lineage from every 3132 to every later centre-seconds reference. | |||
[[File:Ref 3132 full.webp|thumb|right|250px|alt=3132 SS rose gold salmon dial 1938|1938 SS + rose gold, salmon dial]] | [[File:Ref 3132 full.webp|thumb|right|250px|alt=3132 SS rose gold salmon dial 1938|1938 SS + rose gold, salmon dial]] | ||
<span id="the-simultaneous-launch"></span> | <span id="the-simultaneous-launch"></span> | ||
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<span id="the-two-piece-case-shared"></span> | <span id="the-two-piece-case-shared"></span> | ||
== | == Case construction == | ||
Two-piece construction is associated with the 3131/3132 generation, but the public record is not uniform. An Antiquorum description of a stainless-steel and pink-gold 3132 calls the case “three-body,” while other Bubbleback references and specialist descriptions use two-piece terminology. Without case photography and a parts examination, the catalogue wording cannot settle whether this is a different construction or generic auction language. | Two-piece construction is associated with the 3131/3132 generation, but the public record is not uniform. An Antiquorum description of a stainless-steel and pink-gold 3132 calls the case “three-body,” while other Bubbleback references and specialist descriptions use two-piece terminology. Without case photography and a parts examination, the catalogue wording cannot settle whether this is a different construction or generic auction language. | ||
Bezel finishes also vary. Smooth and engine-turned examples are documented, and the Field Manual lists suffix codes that connect some configurations with engine turning. Those suffixes are a secondary reference aid, not proof of a watch’s original fitment; inspect the case, hallmarks and movement together. | Bezel finishes also vary. Smooth and engine-turned examples are documented, and the Field Manual lists suffix codes that connect some configurations with engine turning. Those suffixes are a secondary reference aid, not proof of a watch’s original fitment; inspect the case, hallmarks and movement together. | ||
[[File:Ref 3132 crown-detail.webp|thumb|right|250px|alt=3132 crown profile two-tone case|Crown profile, two-tone case]] | |||
<span id="dimensions"></span> | <span id="dimensions"></span> | ||
=== Dimensions === | === Dimensions === | ||
Case diameter reports track the 3131: 32mm is the most-cited figure, with some sources quoting 32.5mm or 33mm depending on where the caliper sits on the tonneau. The thickness on the 3132 is slightly influenced by the sweep-seconds train (the indirect drive arrangement that Cal. 630 uses adds a fraction of a millimetre to the movement stack), but the dome shape is dominated by the rotor, not by the seconds mechanism. A 3132 and a 3131 | Case diameter reports track the 3131: 32mm is the most-cited figure, with some sources quoting 32.5mm or 33mm depending on where the caliper sits on the tonneau. The thickness on the 3132 is slightly influenced by the sweep-seconds train (the indirect drive arrangement that Cal. 630 uses adds a fraction of a millimetre to the movement stack), but the dome shape is dominated by the rotor, not by the seconds mechanism. A 3132 and a 3131 can share the same case profile despite their different seconds layouts. | ||
<span id="cal.-630"></span> | <span id="cal.-630"></span> | ||
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Cal. 630 is the centre-seconds counterpart to Cal. 620. Same 9¾′′′ NA format, same 17 jewels, same 18,000 bph train, same roughly 40-hour power reserve, same 360-degree unidirectional rotor, same Super Balance, same Swiss lever escapement with Breguet overcoil hairspring. The architecture is shared, and so is the parentage. Cal. 630, like Cal. 620, was developed under Emile Borer at Aegler as part of the Perpetual program that began with the 1931–1933 patents. | Cal. 630 is the centre-seconds counterpart to Cal. 620. Same 9¾′′′ NA format, same 17 jewels, same 18,000 bph train, same roughly 40-hour power reserve, same 360-degree unidirectional rotor, same Super Balance, same Swiss lever escapement with Breguet overcoil hairspring. The architecture is shared, and so is the parentage. Cal. 630, like Cal. 620, was developed under Emile Borer at Aegler as part of the Perpetual program that began with the 1931–1933 patents. | ||
Cal. 630 reworks the motion works so the watch can carry center seconds instead of a subsidiary register. It keeps most of the 620 train but adds an indirect seconds drive. That is the | Cal. 630 reworks the motion works so the watch can carry center seconds instead of a subsidiary register. It keeps most of the 620 train but adds an indirect seconds drive. That is the movement change to verify when identifying the reference. | ||
The indirect centre-seconds layout | The indirect centre-seconds layout can show a slight stutter in the sweep hand and adds a service consideration compared with a direct-drive setup. | ||
Cal. 630 is, like Cal. 620, unidirectional. Bidirectional winding in a Rolex automatic arrives only with Cal. 1030 in 1950, the movement that also ends the Bubbleback era by enabling a flat caseback. | Cal. 630 is, like Cal. 620, unidirectional. Bidirectional winding in a Rolex automatic arrives only with Cal. 1030 in 1950, the movement that also ends the Bubbleback era by enabling a flat caseback. | ||
<span id="precious-metals-only"></span> | <span id="precious-metals-only"></span> | ||
== | == Case materials == | ||
Auction and dealer records document more than one case material for the 3132, including stainless steel, steel-and-gold, and solid-gold examples. Antiquorum’s 2008 and 2024 lots are direct counterexamples to a precious-metals-only rule. The Field Manual also lists a /0 stainless-steel suffix, but a suffix table alone does not establish production volume or original fitment. Record the material from the hallmarks and case, rather than inferring it from the reference number. | Auction and dealer records document more than one case material for the 3132, including stainless steel, steel-and-gold, and solid-gold examples. Antiquorum’s 2008 and 2024 lots are direct counterexamples to a precious-metals-only rule. The Field Manual also lists a /0 stainless-steel suffix, but a suffix table alone does not establish production volume or original fitment. Record the material from the hallmarks and case, rather than inferring it from the reference number. | ||
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== Auction and market record == | == Auction and market record == | ||
The 3132 appears | The 3132 appears infrequently in the cited public-auction record. Antiquorum has catalogued several examples directly. Geneva sold a stainless steel and yellow gold 3132 for CHF 1,625 against a CHF 1,000–2,000 estimate in November 2024, and a second stainless steel and yellow gold example with a tropical dial for CHF 2,250 the same sale — that second watch came fitted with a Rolex riveted bracelet (ref. 7205) dated '64, a later replacement rather than an original-delivery component on a 1930s/40s watch head. An earlier New York sale in October 2008 moved a stainless steel and pink gold 3132 for USD 3,120 against a USD 2,300–2,800 estimate. | ||
The public auction record is too small to support a reference-wide price band or a stable premium for one bezel or dial type. A retailer signature, original dial, case material and condition can change the result, but those effects must be assessed lot by lot. | The public auction record is too small to support a reference-wide price band or a stable premium for one bezel or dial type. A retailer signature, original dial, case material and condition can change the result, but those effects must be assessed lot by lot. | ||
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See also the [[Reference:bubbleback|Bubbleback family index]], [[Reference:Movements|movement reference]], [[Reference:Bracelets|bracelet & clasp guide]], and [[Reference:Serial-numbers|serial numbers by year]]. | See also the [[Reference:bubbleback|Bubbleback family index]], [[Reference:Movements|movement reference]], [[Reference:Bracelets|bracelet & clasp guide]], and [[Reference:Serial-numbers|serial numbers by year]]. | ||
<gallery mode="packed" heights="180"> | <gallery mode="packed" heights="180"> | ||
Ref 3132 hero.webp|Two-tone 3132 with cream dial | File:Ref 3132 hero.webp|Two-tone 3132 with cream dial | ||
Ref 3132 full.webp|Stainless-steel and rose-gold 3132 example | File:Ref 3132 full.webp|Stainless-steel and rose-gold 3132 example | ||
Ref 3132 crown-detail.webp|Crown and case profile | File:Ref 3132 crown-detail.webp|Crown and case profile | ||
</gallery> | </gallery> | ||