Manufacturer Citizen Watch Co. Caliber Number H874, H874-08M Based On Citizen H800 Movement Type Quartz, solar-powered Jewel Count 8 jewels (unconfirmed – based on H800, please share pic in the
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Manufacturer Seiko Time Corp. Caliber Number 6G28, 6G28A Movement Type Quartz, battery-powered Overall Diameter 23.7mm Casing Diameter 23.3mm Height 3.45mm Jewel Count 0 jewels Frequency 32,768 Hz Accuracy Rating Less
Brand Invicta Caliber Number IM-Q-002, IMQ002 Movement Type Quartz, battery-powered Diameter 28.6mm (Unconfirmed) Height 4.4mm (Unconfirmed) Jewel Count 6 jewels (Unconfirmed) Frequency 32,768 Hz Accuracy Rating (Unconfirmed) Battery Cell #
Manufacturer Sea-Gull Caliber Number ST2153 Movement Type Automatic, self-winding mechanical Diameter 30mm Height 6.1mm Jewel Count 32 jewels Beat Rate / Frequency 28,800 bph / 4 Hz Lift Angle Unconfirmed
Manufacturer Fabrique d’Horlogerie de Fontainemelon Caliber Number FHF 96 Other Names Standard 96, ST96, ST-96, 96 ST Movement Type Mechanical, manual-wind Lignes 11.5”’ Diameter 25.6mm Height 4.55mm Jewel Count 17
Manufacturer Ronda Caliber Number 775 Movement Type Quartz, battery-powered Linge 7.75”’ Diameter 17.5mm (case fitting 17.2mm) Thickness 2.50mm (2.75mm including battery) Jewels 5 (gold plated EOL) or 1 (nickel plated)
Brand Parmigiani Fleurier Caliber Number PF703 Based On Vaucher Fleurier SEED VMF 5400 Movement Type Automatic, self-winding mechanical, micro-rotor Lignes 13.25”’ Diameter 30mm Height 3.07mm Jewel Count 29 Total Components
Manufacturer Hangzhou Watch Movement Caliber Number 7500, 7500A, 7500F, HZ7500 Movement Type Automatic, self-winding mechanical, skeleton Diameter 30mm Height 5.23mm Jewel Count 21 jewels Beat Rate / Frequency 28,800 bph
Manufacturer TMI aka Time Module Inc (Seiko Instruments / SII / Hattori) Caliber Number VK68, VK68A Movement Type Quartz (mecaquartz), battery-powered, chronograph Lignes 13.5”’ Diameter 30.8mm x 29.1mm Casing Diameter
Brand Jaeger-LeCoultre (JLC) Caliber Number 630 Movement Type Quartz, mechaquartz Diameter 23.3mm Height 3.7mm (3.8mm including the battery) Jewel Count 25 jewels Frequency 32,768 Hz Accuracy Rating +/- 48 seconds/year
Brand Seiko Time Corp. Caliber Number 78A Movement Type Quartz, battery-powered Diameter 23.3mm Height 2.9mm Jewel Count 5 jewels Frequency 32,768 Hz Battery Cell # 395/399, SR927SW (1.55 V, silver
Manufacturer Grand Seiko (Seiko Time Corp.) Caliber Number 8J56, 8J56A, 8J56B Base Caliber Seiko 8J55 Movement Type Quartz, battery-powered Jewel Count 7 jewels Frequency 32,768 Hz Accuracy Rating +/- 10
Module Maker Dubois Dépraz Module DD9000, DD-9000, 9000M, 9000 Base Caliber ETA 2892A2 Diameter 26.2mm (total including the base movement) Height 5.2mm (total including the base movement) Jewel Count 21
Brand Carl F. Bucherer Caliber Number CFB 1966, CFB1966 In-House? No Base Caliber ETA 2892A2 + DD9000 Movement Type Automatic, self-winding mechanical Diameter 26.2mm Height 5.2mm Jewel Count 21 jewels
On February 12, 2026, COSC (Contrôle Officiel Suisse des Chronomètres) announced a new certification called Excellence Chronometer Certified (ECC). This new certification tightens up average accuracy ratings, increases requirements for
Sources
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