![Alpha Sierra PrototypeX No.5](http://alphasierrawatches.com/cdn/shop/products/ASWPXNO5-1_31fd947f-c144-477d-b13f-ea6c4dc1165f.jpg?v=1673611670&width=1445)
![Alpha Sierra PrototypeX No.5](http://alphasierrawatches.com/cdn/shop/products/ASWPXNO5-2.jpg?v=1706189145&width=1445)
![Alpha Sierra PrototypeX No.5](http://alphasierrawatches.com/cdn/shop/products/ASWPXNO5-3_07bc29c6-1d6d-4f87-80fa-b18290c82865.jpg?v=1706189145&width=1445)
![Alpha Sierra PrototypeX No.5](http://alphasierrawatches.com/cdn/shop/products/ASWPXNO5-4_95865e5b-7122-4e6c-b595-c8d94e4fe2bd.jpg?v=1706189145&width=1445)
![Alpha Sierra PrototypeX No.5](http://alphasierrawatches.com/cdn/shop/products/ASWPXNO5-5_c3a7540d-80e1-4f93-ba92-b3a7163e2541.jpg?v=1706189145&width=1445)
![Alpha Sierra PrototypeX No.5](http://alphasierrawatches.com/cdn/shop/products/ASWPXNO5-6_7452057c-8b98-4c6b-b1b7-ed9d59381711.jpg?v=1706189145&width=1445)
![Alpha Sierra PrototypeX No.5](http://alphasierrawatches.com/cdn/shop/products/ASWPXNO5-8_c6545584-bf4b-43d3-9e9e-ddf2fbf35fa3.jpg?v=1706189145&width=1445)
![Alpha Sierra PrototypeX No.5](http://alphasierrawatches.com/cdn/shop/products/ASWPXNO5-9_059cec2b-e597-4304-b418-90864cf721d4.jpg?v=1706189145&width=1445)
Specs
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Movement
Miyota 8217
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Case material
Stainless steel
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Diameter in mm
42
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Thickness in mm
13
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Water resistance
5 ATM (Rain & Splashproof)
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Bracelet closure
Buckle
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Watch strap length in mm
220
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Glass material
Mineral glass
![](http://alphasierrawatches.com/cdn/shop/files/Schermafbeelding-2022-05-19-om-16.13.13.jpg?v=1662458276&width=1500)
About Us
Alpha Sierra doesn't just make watches, bracelets, and sunglasses; we craft instruments of exploration and self-expression. Our products are designed to empower individuals to embrace their inner adventurer, to seize every moment, and to live life to the fullest.