Manufacturer Grand Seiko Caliber Number 9RB2, 9RB2A Movement Type Spring Drive, hybrid automatic Diameter 30mm Height 5.02mm Jewel Count 34 jewels Accuracy Rating +/- 20 seconds/year Power Reserve 72 hours
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Manufacturer Rolex Year Introduced 2025 Calibers Rolex 7135 Known Materials Nickel phosphorus alloy, ceramic (balance staff) Known Models Rolex Land-Dweller (Ref: 127334) (Add your watch to the comments below…) The
Manufacturer Rolex Caliber Number 7135 Base Caliber Rolex 7140 In-House? Yes Movement Type Automatic, self-winding mechanical Chronometer Spec? Yes (Superlative Chronometer = COSC + Rolex certification) Jewel Count 39 jewels
Brand Breitling Caliber Number B31 Movement Type Automatic, self-winding mechanical Chronometer Spec? Yes (COSC) Diameter 28.4mm Height 4.8mm Jewel Count 26 jewels Beat Rate / Frequency 28,800 bph / 4
Brand Cartier Caliber Number 78-1, 78/1 In-House? No Base Caliber ETA 2512-1 Movement Type Mechanical, manual-wind Lignes 7.75”’ Overall Diameter 17.5mm Casing Diameter 17.2mm Height 2.85mm Jewel Count 17 jewels
Manufacturer Seiko Caliber Number A904, A904A, A 904 Movement Type Digital, quartz Diameter 27.4mm Height 4.8mm Jewel Count No jewels (0) Accuracy Rating +/- 20 seconds per month Battery Cell
Brand Tissot Caliber Number 744 Base Caliber ETA 2551 Movement Type Automatic, self-winding mechanical Lignes 7.75”’ Overall Diameter 17.5mm Casing Diameter 17.2mm Height 4.5mm Jewel Count 21 jewels Beat Rate
Manufacturer Tianjin Sea-Gull Caliber Number ST18, ST18XX, TY26, TY26XX Movement Type Automatic, self-winding mechanical Based On ETA 2892A2 Diameter 25.6mm Height 3.91mm Jewel Count 21/24 jewels Total Parts 172 components
Manufacturer Citizen Caliber Number U822 Movement Type Quartz, solar-powered Jewel Count Unconfirmed Frequency 32,768 Hz Accuracy Rating +/- 15 seconds/month Power Reserve ~1 year on a full charge (3 yrs
Brand Liudas Norkus Caliber Number LN1, LN-01 Movement Type Mechanical, manual-wind, regulateur style In-House? No Exclusive? Yes Base Caliber Seagull ST3600 Diameter Unconfirmed Height Unconfirmed Jewel Count 17 jewels Beat
Manufacturer Seiko Time Corp. Caliber Number 7L22, 7L22A Movement Type Kinetic, rechargeable quartz Diameter 32mm Casing Diameter 30mm Height 6.4mm Jewel Count 8 jewels Frequency 32,768 Hz Accuracy Rating <
Manufacturer Seiko Time Corp. Caliber Number 6A32, 6A32A Movement Type Quartz, battery-powered, perpetual calendar Diameter 27.8mm Casing Diameter 27.3mm Height 3.69mm Jewel Count No jewels (0) Frequency 32,768 Hz Accuracy
Manufacturer Sunon Caliber Number PE50 Movement Type Quartz, battery-powered Lignes 12.75”’ Diameter 29.75mm Height 4.52mm Jewel Count No jewels (0) Frequency 32,768 Hz Accuracy Rating +/- 45 seconds/month Battery Cell
A balance tack serves as a place to put your balance assembly after removal from the watch movement. Here is how Bergeon describes their version of this tool: “Enables the
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