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Citizen 7620

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Citizen 7620 caliber

Basic Information

Name	Citizen 7620
Manufacturer	Citizen
Launch Year	1971
Caliber Family	Description 7200, 7210, 7220: 28800 A/h, 26 jewels, day, date 7230: 36000 A/h, 28 jewels, day, date, chronometer, hack 7270: 28800 A/h, 21/23/25 jewels, day, date 7280: 28800 A/h, 23 jewels, day, date 7290: 28800 A/h, 21/23/25 jewels, day, date, hack 7400: 36000 A/h, 31 jewels, date 7430: 36000 A/h, 28 jewels, day, date, chronometer, hack 7450: 21600 A/h, 21 jewels, date, 12h- and 24h hand 7470: 21600 A/h, 21 jewels, date 7610, 7620: 28800 A/h, 26 jewels 7611: 21600 A/h, 25 jewels, skelettonized, hack 7700: 28800 A/h, 24 jewels, day, date 7710: 28800 A/h, 26 jewels, day, date 7730, 7740: 36000 A/h, 28 jewels, day, date 7750: 36000 A/h, 31 jewels, date 7760: 28800 A/h, 26 jewels, date, golf score counter Related calibers Citizen 7200, Citizen 7210, Citizen 7220, Citizen 7230, Citizen 7270, Citizen 7280, Citizen 7290, Citizen 7400, Citizen 7430, Citizen 7450, Citizen 7470, Citizen 7610, Citizen 7611, Citizen 7620, Citizen 7700, Citizen 7710, Citizen 7730, Citizen 7740, Citizen 7750, Citizen 7760
Is COSC certified	No

Technical Details

Lignes Dimensions	12.5 ‴
Dimensions	28.4 mm
Height	4.8 mm
Further Measures	Mounting Diameter (Dm): 28.05mm Ball Bearing: 0.35mm Stem height (T): 1.8mm Mounting Height (F): 1.15mm
Power Reserve	41 hours
Frequency	28,800 vph
Jewels	26
Lift Angle	46 degrees

Complications and Specifications

Shape	Round
Complications	Sweep Second
Regulator Type	Pinned Regulator (or Index Regulator)
Movement Type	Automatic
Rotor Type	Central Rotor
Escapement Type	Swiss Lever
Control Type	Balance Wheel
Winding Type	Automatic (Rotor-Driven)
Setting Type	Stem Set (Crown Pull)

Additional Information

Hand Sizes	1.52 x 1.00 x 0.17mm
Hand Count	3
Country Of Manufacture	(not set)
Notes	Remarks: 1971- jewel bearings for barrel differences not known between 7610, 7620 Other data: balance staff: Citizen 039-61 balance with hairspring stem: Citizen 065-99
Signature	1971: K, K, Citizen, Japan, 21 J.; Parashock (Citizen 7270, 21600 A/h)

Metadata

Created At	Sep 15, 2023
Updated At	Apr 23, 2025, 11:31:26 PM