Rolex caliber 3230 movement – specifications and photo

Rolex caliber 3230 is Swiss movement from 2020.

Functions: hours, minutes and seconds

Automatic (bi-directional winding) movement with 31 jewels

f = 28800 A/h/4 HZ

Power reserve: 70 hours

Diameter: 28.5 mm


Made of nickel-phosphorus, it is also insensitive to magnetic fields. The movement is fitted with an optimized blue Parachrom hairspring, manufactured by Rolex in an exclusive paramagnetic alloy that makes it up to 10 times more precise than a traditional hairspring in case of shocks. The blue Parachrom hairspring is equipped with a Rolex overcoil, ensuring the calibre’s regularity in any position.

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IWC caliber 79420 movement – specifications and photo

IWC caliber 79420 is Swiss movement from 201X.

Functions: day and date display, chronograph, small hacking seconds, rattrapante (split seconds hand for intermediate timing).

Automatic movement with 29 jewels

f = 28800 A/h/4 HZ

Power reserve: 44 hours

Diameter: 30.0 mm

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Bulova 12EBACD (Buren 1322) movement – specifications and photo

Bulova 12EBACD (Buren 1322) is Swiss movement from 1960’s.

Functions: sweep second, date – changing between 23 and 24 h

Automatic movement with 17 or 30 jewels

f = 19800 A/h

Power reserve: 54 hours

Diameter: 28.15 mm

More information:

Angle of lift: 48°, micro rotor, double jewel bearing if 30 jewels double excenter
regulator for curb pins and stud carrier
selfwinding gear with direction switching by a pinion floating between two huge jewels

Oscillating weight set in the movement. No additional height taken up by the self-winding mechanism. Oscillating
weight made of heavy antimagnetic alloy. Mechanical inverser on roller bearings: no wear. Automatic engaging and disengaging of manual and automatic winding. Thus only the operating gear turns, performance is improved and there is no wear. Sliding pinion set between large jewels.

Bulova 12EBACD (Buren 1322) – Technical Bulletin

Spare parts for Bulova 12EBACD (Buren 1322)

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