Manufacturer ETA Caliber Number 2850 Movement Type Mechanical, manual-wind Lignes 11.5”’ Diameter 25.6mm Height 4.3mm Jewel Count Varies Beat Rate 28,800 vph, 4 Hz Lift Angle 52 degrees Power Reserve
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Manufacturer Miyota Caliber Number 0S11 Movement Type Quartz, battery-powered Style Vertical bi-compax chronograph (12-6) Lignes 13.5”’ Diameter 30.8mm Height 4.13mm thickness Jewels 0 (no jewels) Frequency 32,768Hz Accuracy Rating +/-
Manufacturer Seiko Caliber Number 6532A Movement Type Quartz, battery-powered Lignes 10.5”’ Diameter 24mm Casing Diameter 23.3mm Height 2.7mm Jewel Count 5 Frequency 32,768 Hz Accuracy Rating Less than 15 seconds/month
Brand Oris Caliber Number 641 In-House? No Base Caliber ETA 2836-2 Movement Type Automatic, self-winding mechanical Chronometer? Yes COSC? Yes Lignes 11.5”’ Diameter 26mm Casing Diameter 25.6mm Height 5.05mm (unconfirmed)
Manufacturer Seiko Caliber Number 6810 In-House? Yes Base Caliber Seiko 68A Similar Calibers Credor 6810, 6810A Movement Type Mechanical, manual-wind Shape Tonneau Diameter 19.7mm x 16.9mm Height 1.98mm Jewel Count
Brand Oris Caliber Number 645 In-House? No Base Caliber ETA 2836-2 Movement Type Automatic, self-winding mechanical Lignes 11.5”’ Diameter 26mm Casing Diameter 25.6mm Height 4.6mm (unconfirmed) Jewel Count 27 Beat
Brand Oris Caliber Number 644 In-House? No Base Caliber ETA 2836-2 Movement Type Automatic, self-winding mechanical Lignes 11.5”’ Diameter 26mm Casing Diameter 25.6mm Height 5.05mm (unconfirmed) Jewel Count 27 Beat
Manufacturer Miyota (Citizen) Caliber Number 0S80 (sometimes incorrectly typed as OS80) Type Quartz Replaces Caliber Unknown, please add in the comments below Lignes 13.5”’ Diameter 30.8mm Height 4.68mm Jewels 0
Manufacturer PTS Resources Limited Caliber Number DG-2813, DG2813 Based On Miyota 8215 Movement Type Automatic, self-winding mechanical Diameter 26mm Height 5.4mm thick Jewels 22 Beat Rate 21,600 bph Lift Angle
Manufacturer PTS Resources Limited Caliber Number G3265ZH, G3265Z, G3265, 3265 Type Automatic, self-winding mechanical Diameter 32.8mm Height 5.87mm thick Jewels 20 Vibrations Per Hour 21,600 bph Lift Angle Unconfirmed Hand
Brand Longines Caliber Number L687 In-House? No Base Caliber ETA A08.L91 (ETA/Valjoux 7751) Movement Type Automatic, self-winding mechanical Lignes 13.25”’ Diameter 30mm Height 7.9mm Jewel Count 25 Beat Rate 28,800
Manufacturer Ronda Caliber Number 756 Movement Type Quartz, battery-powered, analog Lignes 5.5”’ Diameter 13mm Height 3.1mm Jewel Count 4 or 1 (see below) Frequency 32,768 Hz Battery Cell 379 /
Brand Credor (Seiko Watch Corporation) Caliber Number 7R31, 7R31A In-House? Yes Movement Type Spring Drive, manual-wind Diameter Unconfirmed Height Unconfirmed Jewel Count 30 Frequency 32,768 Hz Claimed Accuracy Within 15
Manufacturer Citizen Caliber Number E111 (E111M) Movement Type Solar-Powered, quartz Lignes 10.5”’ Diameter 23.7mm x 22.6mm Height 3.5mm thick Jewels 0 Frequency 32,768 Hz Accuracy Rating +/- 15 sec/month Battery
Manufacturer ETA Caliber Number F06.111 (not FO6.111) Replaces Calibers ETA 955.112 Type Quartz Linges 11.5”’ Overall Diameter 25.6mm Casing Diameter 26.20 Height 2.5mm thick Jewels Three (3) Frequency 32,768 Hz
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