Brand Tudor Caliber Number MT5450-U Base Caliber Tudor MT5400 In-House? No (“Manufacture”) Manufacturer Kenissi Movement Type Automatic, self-winding mechanical COSC Tested? Yes Master Chronometer? Yes (METAS) Diameter 30.3mm Height Unconfirmed
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Brand Baume & Mercier Caliber Number BM 12100, BM12100 Movement Type Quartz, battery-powered Lignes 12.5”’ Diameter 28mm Height 3.7mm Jewel Count 7 Frequency 32,768 Hz Battery Cell 390 Hand Count
Brand Bremont Caliber Number BE-36AE Movement Type Automatic, self-winding mechanical In-House? No Base Caliber Sellita SW220-1 COSC? Yes Lignes 11.5”’ Diameter 25.6mm Height 4.6mm Jewel Count 25 Beat Rate 28,800
Manufacturer Sellita Caliber Number AMT5100 M Base Caliber SW510 M Movement Type Mechanical, manual-wind chronograph Lignes 13.25”’ Diameter 30mm Height 7mm Jewels 23 Beat Rate 28,800 bph, 4Hz Lift Angle
Manufacturer Grand Seiko Caliber Number 9S64, 9S64A In-House? Yes Movement Type Mechanical, manual-wind Jewel Count 24 Beat Rate 28,800 vph, 4 Hz Lift Angle Unconfirmed Accuracy Rating +/-10 sec/day Power
Brand Citizen Caliber Number 7730 Movement Type Automatic, self-winding mechanical Base Caliber Citizen 7700 Diameter 28mm Height 4.86mm Jewel Count 26 Beat Rate 36,000 vph Lift Angle 48 degrees Power
Manufacturer Sellita Caliber Number SW221-1, SW 221-1 Movement Type Automatic, self-winding mechanical Base Caliber Sellita SW200-1 Lignes 11.5”’ Overall Diameter 26mm Casing Diameter 25.60mm Height 5.05mm thick Jewels 26 Power
Manufacturer Seagull Caliber Number ST6, TY6D1K, TY6XX Movement Type Automatic, self-winding mechanical Diameter 19.8mm Height Depends on version Jewels 17 Beats per hour 21,600 vph, 3Hz Power Reserve > 36
Manufacturer Seagull Caliber Number TY-2706, TY2706, ST1701, ST17 Base Caliber ST16 Movement Type Automatic, self-winding mechanical Lignes 11.5”’ Diameter 26mm Height 4.65mm Jewels 20 Beats per hour 21,600 vph, 3Hz
Brand Citizen Caliber Number 8229, 8229A Manufacturer Miyota In-House? Yes (Citizen owns Miyota) Movement Type Automatic, self-winding mechanical Lignes 11.5”’ Diameter 26mm Height 5.67mm Jewels 21 Vibrations Per Hour 21,600
On December 17, 2020, Sellita published an R&D technical commutation / specific information sheet (No. 25) with regards to “Optimization barrel SW3XX-1” aka the RDM+ barrel. In Sellita’s own words:
Brand Bell & Ross Caliber Number BR-CAL 302, BR-302 In-House? No Base Caliber Sellita SW300-1 Movement Type Automatic, self-winding mechanical Lignes 11.5”’ Diameter 25.6mm Height 3.6mm thick Jewels 25 Vibrations
Brand Ulysse Nardin Caliber Number UN-816, UN816 In-House? No Base Caliber Sellita SW300-1 Movement Type Automatic, self-winding mechanical Lignes 11.5”’ Diameter 26.5mm Height 3.6mm Jewel Count 25 Beat Rate 28,800
Manufacturer S. Epson (Seiko) Caliber Number YN56 (aka YN56A) Movement Type Automatic, self-winding mechanical Lignes 12.1”’ Diameter 27.4mm Height 5.32mm Jewels 22 Beat Rate 21,600 bph Lift Angle 52 degrees
Manufacturer ETA Caliber Number 2842 Movement Type Automatic, self-winding mechanical Lignes 11.5”’ Diameter 26mm Height 4.7mm Jewel Count 21 (date version have 23) Beat Rate 21,600 vph Lift Angle 50
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