Brand Ronda Caliber Number Ronda 6203.B Type Quartz Lignes 11.5”’ Diameter 26mm Thickness 3.3mm Jewels 1 or 5 (see blow) Battery Cell Number 373 (1.5 V) Claimed Battery Life 40
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Manufacturer Sellita Caliber Number SW510 BH a, SW510 BHa, SW510BHa Base Caliber SW510 (base base is the ETA/Valjoux 7750) Movement Type Automatic, self-winding, bi-compax chronograph Lignes 13.25”’ Diameter 30mm Height
Manufacturer MB&F Caliber Number HM8 Mark 2 In-House? Yes and No (see below) Base Caliber Girard-Perregaux (caliber number unconfirmed) Type Automatic, self-winding mechanical Jewels 30 Number of Parts 247 Power
Manufacturer Rolex Caliber Number 4132 Movement Type Automatic, self-winding mechanical, chronograph In-House? Yes Chronometer? Yes (COSC + Superlative Rolex certification) Jewels 47 Power Reserve ~72 hours Beat Rate 28,800 vph
Brand Roger Dubuis Caliber Number RD115, RD115 Movement Type Mechanical, tourbillon In-House? Yes Lignes 16”’ Diameter ~36mm Height 12.2mm Jewels 29 Total Parts 277 components Beat Rate 21,600 vph (3
Brand Ingersoll Caliber Number IN522, 522 Movement Type Automatic, self-winding mechanical Lignes Unconfirmed Diameter Unconfirmed Height Unconfirmed Jewels 20 Beat Rate 21,600 vph Lift Angle Unconfirmed Power Reserve ~30 hours
Brand O.G Watches (Oliver Gallaugher) Manufacturer DK Precision Mechanics Caliber Number GUY-1 Base Caliber ETA/Unitas 6498-1 Movement Type Mechanical, manual-wind Lignes 16.5”’ Diameter 36.6mm Height 4.5mm Jewels 17 Beat Rate
Manufacturer Armin Strom Caliber Number ARF21 Based On Armin Strom ARF15 Movement Type Mechanical, manual-wind In-House? Yes Diameter 37.2mm Height 6.7mm Jewels 39 Total Parts 276 components Beat Rate 25,200
Brand Minhoon Yoo Caliber ETA/Peseux 7001 Movement Type Mechanical, manual-wind Lignes 10.5”’ Diameter 23.3mm Height 2.5mm Jewels 17 Beat Rate 21,600 vph, 3Hz Lift Angle 50 degrees Power Reserve ~42
Brand Eterna Caliber Number 3030 Based On Eterna caliber 1505 Movement Type Automatic, self-winding mechanical In-House? Yes Diameter 30mm Height 4.63mm Jewels 24 Beat Rate 28,800vph (4Hz) Lift Angle Unconfirmed
Brand NOMOS Glashütte Caliber Number DUW 4101, DUW4101 Based On NOMOS beta In-House? Yes Movement Type Mechanical, manual-wind Linges 14.25”’ Diameter 32.1mm Height 2.8mm thick Jewels 26 Beat Rate 21,600
Manufacturer Seiko (Daini Seikosha factory) Caliber Number 6106C Base Caliber 6106A Movement Type Automatic, self-winding mechanical Diameter 27mm Height 5.15mm Jewels 17, 23 or 25 Beat Rate 21,600 Lift Angle
Brand Seiko Caliber Number 5Y23, 5Y23A Movement Type Quartz Lignes 10.5”’ Outer Diameter 25.4mm Inner Diameter 19mm x 22mm Casing Diameter 23.3mm Height 2.7mm Jewels 1 Frequency 32,768 Hz Battery
Manufacturer Citizen Caliber Number B035 Replaces Citizen caliber B033 Movement Type Solar-powered, quartz Display Analog Diameter Unconfirmed Height Unconfirmed Jewels Unconfirmed Capacitor 295-76 (MT516F) Power Reserve 7 months on a
Manufacturer Citizen Caliber Number E365 Movement Type Quartz, solar-powered Diameter 27mm Jewels Unconfirmed Accuracy +/-15 seconds/month Power Reserve 1 year on a full charge Hand Count 3 Functions Central hours;
Sources
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