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Caliber database

Fourteen reference families, sortable and comparable. Generic layouts only — no brand names, no claimed performance figures.

Reference dataThese rows describe generic movement families for identification practice. They are not a substitute for a manufacturer's technical sheet, and no row certifies or endorses any product.

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Generic Automatic 28	Automatic	25J	28,800	42 h	25.6	4.6	2010
Generic Automatic 28 — Common three-hand automatic layout with date. Rotor winds in both directions through a reduction gear. Automatic Bidirectional rotor 25J 28,800 vph 25.6 × 4.6 mm 42 h reserve Movements & calibers Power reserve calculator
Generic Automatic 21	Automatic	21J	21,600	38 h	26.0	5.1	1995
Generic Automatic 21 — Older automatic layout at a slower beat rate. Jewel count is lower because several bearings run in bushes. Automatic Unidirectional rotor 21J 21,600 vph 26.0 × 5.1 mm 38 h reserve Movements & calibers Power reserve calculator
Hi-Beat Automatic 36	Automatic	31J	36,000	45 h	27.4	5.0	2018
Hi-Beat Automatic 36 — High-frequency automatic. Finer time division, higher impulse count, tighter lubricant requirements. Automatic Bidirectional rotor 31J 36,000 vph 27.4 × 5.0 mm 45 h reserve Movements & calibers Power reserve calculator
Manual Wind 18	Manual	17J	18,000	44 h	23.3	3.9	1972
Manual Wind 18 — Classic slow-beat hand-wound layout. Slim, tolerant of older lubricants, easy to service. Manual Crown, ratchet wheel 17J 18,000 vph 23.3 × 3.9 mm 44 h reserve Movements & calibers Power reserve calculator
Manual Wind 21	Manual	21J	21,600	40 h	25.6	4.2	1988
Manual Wind 21 — Mid-range hand-wound movement with a centre seconds wheel and a swan-neck regulator on some variants. Manual Crown, ratchet wheel 21J 21,600 vph 25.6 × 4.2 mm 40 h reserve Movements & calibers Power reserve calculator
Manual Wind 28	Manual	23J	28,800	48 h	29.0	4.8	2005
Manual Wind 28 — Larger hand-wound movement with an extended barrel for reserve. Often used for display case backs. Manual Crown, ratchet wheel 23J 28,800 vph 29.0 × 4.8 mm 48 h reserve Movements & calibers Power reserve calculator
Automatic Chronograph	Automatic	37J	28,800	48 h	30.0	7.2	2014
Automatic Chronograph — Automatic base with a coulisse-lever chronograph module. Higher jewel count and greater thickness. Automatic Bidirectional rotor 37J 28,800 vph 30.0 × 7.2 mm 48 h reserve Movements & calibers Power reserve calculator
Automatic GMT	Automatic	28J	28,800	50 h	26.6	5.4	2016
Automatic GMT — Automatic with a 24-hour hand driven off the hour wheel through an intermediate reduction. Automatic Bidirectional rotor 28J 28,800 vph 26.6 × 5.4 mm 50 h reserve Movements & calibers Power reserve calculator
Micro-Rotor Automatic	Automatic	29J	21,600	55 h	30.2	3.4	2019
Micro-Rotor Automatic — Recessed small rotor keeps the movement thin. Slower winding rate for the same wear time. Automatic Micro-rotor 29J 21,600 vph 30.2 × 3.4 mm 55 h reserve Movements & calibers Power reserve calculator
Quartz 3-Hand	Quartz	—	32,768	8760 h	23.4	2.6	2008
Quartz 3-Hand — Standard quartz analog layout. Rate is set by a quartz crystal oscillator, not a balance wheel. Quartz Battery, stepper motor No jewels 32,768 vph 23.4 × 2.6 mm 8760 h reserve Movements & calibers Power reserve calculator
Quartz Chronograph	Quartz	—	32,768	7300 h	28.8	4.4	2012
Quartz Chronograph — Quartz with additional stepper motors for chronograph function. Jewel count is not applicable. Quartz Battery, stepper motors No jewels 32,768 vph 28.8 × 4.4 mm 7300 h reserve Movements & calibers Power reserve calculator
Manual Wind 8-Day	Manual	19J	18,000	192 h	34.0	6.2	2001
Manual Wind 8-Day — Long-reserve layout using two barrels in series. Torque drops noticeably across the reserve. Manual Crown, twin barrels 19J 18,000 vph 34.0 × 6.2 mm 192 h reserve Movements & calibers Power reserve calculator
Compact Automatic	Automatic	20J	21,600	36 h	20.8	4.4	2003
Compact Automatic — Reduced-diameter automatic for smaller cases. Tighter tolerances and less amplitude headroom. Automatic Bidirectional rotor 20J 21,600 vph 20.8 × 4.4 mm 36 h reserve Movements & calibers Power reserve calculator
Pocket Watch Manual	Manual	15J	18,000	36 h	43.0	6.8	1910
Pocket Watch Manual — Large slow-beat layout. Generous space between parts; typically a lever escapement with a flat hairspring. Manual Key or crown 15J 18,000 vph 43.0 × 6.8 mm 36 h reserve Movements & calibers Power reserve calculator

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Figures describe generic families for identification practice. They are not manufacturer specifications, and no row guarantees a timekeeping result.

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Automatic Movement

A self-winding movement: a rotor converts wrist motion into mainspring tension.

Movements & Calibers

Manual Wind Movement

Hand-wound: crown, ratchet wheel and click convert turning into stored torque.

Movements & Calibers

Quartz Movement

A crystal oscillator, a divider chain and a stepper motor instead of a balance.

Movements & Calibers