JR1090 in-house manufactured self-winding mechanical movement calibre 11 1/2’’’, 34 jewels, frequency 28.800 vib./hour (4 Hz) 48 hours minimum power reserve Hours at 12 o'clock, power reserve indicator at 4.30 o'clock, small seconds at 9 o’clock and date window at 3 o’clock Steel case, diameter 42 mm, height 10.75 mm Curved, anti-reflective sapphire glass Back secured with 6 screws Sapphire glass case-back Water-resistant to 30 m Opalin silver dial, satin-finished sunburst effect applied hours and minutes zone Alligator strap with steel folding buckle
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