S1-309: The watch features a steel case housing a black metal dial with silver indexes, topped with smokey acetate bezel and it's fitted with a natural cowhide leather strap.


ESU watches inspired by the feature of eyewear that you can easy to alter your style by replacing the frame. The specially designed watch case allows you to change the bezel effortlessly depending on what you wear for your need. The watch designed to be easy to mix and match and withstand the test of time. It has a hand-polished 316L stainless steel case houses a precise Swiss movement with calendar function, the sapphire crystal glass and metal dial gives the watches a refined look, the quick release strap is made of vegetable-tanned Italian leather which is breathable, absorbent and will gradually become mild and soft over time. ESU is a watch tells a story, portraying the personality of a user and perfect for everyday wear.



  • Case Material: 316L Stainless steel 
    Case Diameter: 40mm
    Bezel: Acetate
    Glass: Sapphire crystal glass
    Dial: Black metal dial
    Strap: Vegetable tanned leather strap
    Water-resistant: 5 ATM
    Caliber: Ronda Caliber 785
    Battery: Silver Oxide SR721SW
    Battery Life: Approx. 3 years
    Accuracy: -10/ +20 sec/month
    Lug Width:20mm
    Wrist Fitting: Approx. 140mm - 205mm
    Weight: 50 grams
    Warranty: 24 months

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