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Case: 31 mm Nylon 6 impact protective
Movement: quartz
Hands: Thin aluminum single-layer hands
Lens: Scratch-resistant mineral glass
Lume: The hands, dial and case glows in the dark. Minute glow: blue, hour glow: green.
Crown: Screw down 316L stainless steel
Strap: 17mm recycled woven polyester, size S fitting circumference range of 5-6"
Buckle: 316L stainless steel
Water Resistance: 10 ATM / 100 meters
Theoretical Battery life: 8 years
Accuracy: +/- 10 Seconds Per Month
Provenance: ‘Swiss Made’
Warranty: 2 Years
Case + Bezel: Swiss nylon bio polymer
Strap Upper: 100% recycled woven polyester
Strap Liner: Antimicrobial polyurethane alt-nappa leather,
Fastening: Nylon
Buckle: 316L stainless steel
BK31 ships with a small size strap. Our straps are fully adjustable with a reliable Velcro fastening. Recommended fitting for our small watch band is wrist circumferences 5.0” - 6” / 130mm - 150mm
Estimated Express Shipping Times
North America 1-2 Business Days
Europe 2-3 Business Days
Rest of World 3-5 Business Days
We offer a range of swift, fully tracked shipping options with Fedex to a wide variety of international destinations. Orders received before 1pm Monday to Friday will be shipped that day. Any taxes and / or duties due upon reaching your destination will be added in the checkout so no extra bills once your item has been received. For more information please consult our Shipping & Returns policy.
The hands, dial and case numbers of the BK31 glow in the dark, making it easier for kids to check the time in low light conditions - like the basement of the 3 story pillow fort.
A cornerstone feature of dive watches, the screw-down
crown seals the case impenetrably, to a depth of 100m.
Though it is, perhaps, ‘unlikely’ that your intrepid child will
dive to 100m, it’s still a cool flex.
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