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:
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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
Manufacturer ETA Caliber Number 805.112, 805112 Movement Type Quartz, battery-powered Lignes 11.5”’ Diameter 25.6mm Height 3.65mm (3.7mm including battery) Jewel Count 0 Frequency 32,768 Hz Battery Cell 377 Battery Life
PTS Resources (partner with Hangzhou Watch Company), is based in Hong Kong with offices in Shenzhen and Guangzhou. Made in China watch movements are painstakingly difficult to research and organize.
Brand Citizen Watch Co. Caliber Number B612, B612A Manufacturer Miyota (owned by Citizen) Movement Type Quartz, solar-powered Lignes Unconfirmed Diameter Unconfirmed Height Unconfirmed Jewel Count No jewels (0) Frequency 32,768
Brand Junghans Caliber Number J800.1 Base Caliber ETA 2824-2 or Sellita SW200-1 Movement Type Automatic, self-winding mechanical Lignes 11.5”’ Diameter 25.6mm Thickness 4.6mm Jewels 25 or 26 Vibrations Per Hour
Manufacturer Seiko Caliber Number 7009, 7009A Movement Type Automatic, self-winding mechanical Diameter 27.4mm Casing Diameter 27mm Height 4.9mm Jewel Count 17 Beat Rate 21,600 vph Lift Angle Unconfirmed Power Reserve
Manufacturer ETA Caliber Number E64.111, E64111 Base Caliber ETA E64.111 Movement Type Quartz, battery-powered Thermocompensated? Possible (see below) Lignes 11.5”’ Diameter 25.6mm Height 1.95mm (not including the battery) Jewels Eight
Manufacturer ESA (Ebauches S.A.) Caliber Number 9154 Movement Type Electronic Lignes 12.5”’ Diameter 28mm Height 5.5mm Jewel Count 13 Frequency 28,800 vph, 4Hz Battery Cell 344 (unconfirmed!) Battery Life Unconfirmed
Manufacturer Seiko Caliber Number 6923, 6923A Movement Type Quartz, battery-powered Display Analog Outside Diameter 25.3mm Height 2.5mm Jewel Count 2 Frequency 32,768 Hz Battery Cell SR926SW Battery Life ~5 years
Manufacturer Seiko Brand Pulsar Caliber Number Y301, Y301A Movement Type Quartz, high-accuracy quartz Diameter 20mm Casing Diameter 19.5mm Height 1.6mm Jewel Count 3 Frequency 32,768 Hz Accuracy Rating +/-10 sec/yr
Manufacturer Orient Caliber Number F6S22 In-House? Yes Movement Type Automatic, self-winding mechanical Diameter Unconfirmed Height Unconfirmed Jewel Count Twenty-four (24) Beat Rate 21,600 vph Lift Angle Unconfirmed Power Reserve ~40
Sources
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