Reference:3132: Difference between revisions

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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.

~~What~~ Cal. 630 reworks is the motion works~~. Subsidiary seconds movements drive~~ the seconds ~~pinion directly from the fourth wheel;~~ a ~~small~~ register ~~sits below the main dial, reading off the fourth wheel’s rotation~~. ~~A centre sweep seconds movement needs to bring that motion up to the centre~~ of the dial, which requires either a direct centre-seconds architecture (where the fourth wheel is repositioned to sit on the central axis) or an indirect drive (where the fourth wheel stays in its original position and an extra wheel train carries motion up to a sweep hand at the dial centre). Cal. 630 uses the indirect approach. It retained the Cal. 620 train ~~layout almost entirely and added~~ an indirect seconds drive on ~~top of it~~.

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 practical movement change buyers are really looking at on the reference.

The choice has two practical consequences. Indirect centre seconds exhibit a slight stutter or backlash in the sweep hand, because the coupling between the drive train and the seconds pinion is looser than a direct centre-seconds arrangement. Service history can exaggerate it. A well-serviced Cal. 630 reads as smooth to most observers; close observation in good light will show the characteristic indirect-drive hesitation. The indirect drive also adds minor complexity that makes servicing marginally more demanding, which is one plausible reason 3132 survival rates may lag 3131 rates slightly. More service interventions mean more opportunities for parts replacement, refinishing, and retirement.

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The 3132 appears at public auction less frequently than the 3131, which itself is not a high-frequency reference. Specific well-documented lots are thinner on the record, and the price band for the reference is established more by dealer listings and private-sale indices than by marquee auction results.

~~What~~ the record ~~does support~~ is ~~a working market framework~~. Standard~~-dial, good-condition 3132~~ examples ~~in 14K yellow gold trade in a band broadly comparable~~ to the 3131 baseline, ~~roughly EUR 3,000–5,000 / CHF 3,000–6,000 for unrestored examples with original dials. 18K~~ pink gold examples ~~with case-matched salmon or pink dials~~ sit at the top of the ~~type-specific market~~, ~~with premium examples reaching the mid-to-high four-figure Swiss franc range~~ and ~~occasionally crossing into five figures when provenance and condition align. Engine~~-turned bezel ~~examples (the /3, /7, /8 suffix~~ variants~~) typically command~~ a modest premium over smooth-bezel ~~examples of equivalent metal and dial configuration, reflecting both the visual distinctness and the Field Manual’s coding of engine turning as the signature 3132 construction~~.

The market framework is clear enough even if the record is thin. Standard 14k examples sit close to the 3131 baseline, pink-gold examples sit at the top of the range, and engine-turned bezel variants usually add a modest premium over smooth-bezel watches.

Serpico y Laino co-signed 3132s with verified authenticity and strong original dial condition represent the top end of the reference’s market, with auction results for comparable co-signed vintage Bubblebacks reaching into the USD 15,000–25,000 range when hammered.

@@ Line 85: / Line 85: @@
 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.
-What Cal. 630 reworks is the motion works. Subsidiary seconds movements drive the seconds pinion directly from the fourth wheel; a small register sits below the main dial, reading off the fourth wheel’s rotation. A centre sweep seconds movement needs to bring that motion up to the centre of the dial, which requires either a direct centre-seconds architecture (where the fourth wheel is repositioned to sit on the central axis) or an indirect drive (where the fourth wheel stays in its original position and an extra wheel train carries motion up to a sweep hand at the dial centre). Cal. 630 uses the indirect approach. It retained the Cal. 620 train layout almost entirely and added an indirect seconds drive on top of it.
+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 practical movement change buyers are really looking at on the reference.
 The choice has two practical consequences. Indirect centre seconds exhibit a slight stutter or backlash in the sweep hand, because the coupling between the drive train and the seconds pinion is looser than a direct centre-seconds arrangement. Service history can exaggerate it. A well-serviced Cal. 630 reads as smooth to most observers; close observation in good light will show the characteristic indirect-drive hesitation. The indirect drive also adds minor complexity that makes servicing marginally more demanding, which is one plausible reason 3132 survival rates may lag 3131 rates slightly. More service interventions mean more opportunities for parts replacement, refinishing, and retirement.
@@ Line 125: / Line 125: @@
 The 3132 appears at public auction less frequently than the 3131, which itself is not a high-frequency reference. Specific well-documented lots are thinner on the record, and the price band for the reference is established more by dealer listings and private-sale indices than by marquee auction results.
-What the record does support is a working market framework. Standard-dial, good-condition 3132 examples in 14K yellow gold trade in a band broadly comparable to the 3131 baseline, roughly EUR 3,000–5,000 / CHF 3,000–6,000 for unrestored examples with original dials. 18K pink gold examples with case-matched salmon or pink dials sit at the top of the type-specific market, with premium examples reaching the mid-to-high four-figure Swiss franc range and occasionally crossing into five figures when provenance and condition align. Engine-turned bezel examples (the /3, /7, /8 suffix variants) typically command a modest premium over smooth-bezel examples of equivalent metal and dial configuration, reflecting both the visual distinctness and the Field Manual’s coding of engine turning as the signature 3132 construction.
+The market framework is clear enough even if the record is thin. Standard 14k examples sit close to the 3131 baseline, pink-gold examples sit at the top of the range, and engine-turned bezel variants usually add a modest premium over smooth-bezel watches.
 Serpico y Laino co-signed 3132s with verified authenticity and strong original dial condition represent the top end of the reference’s market, with auction results for comparable co-signed vintage Bubblebacks reaching into the USD 15,000–25,000 range when hammered.