![Alpha Sierra PrototypeX No.1](http://alphasierrawatches.com/cdn/shop/products/ASWPXNO1-1_acf85d45-d700-4740-a293-2a90116ff485.jpg?v=1673611589&width=1445)
![Alpha Sierra PrototypeX No.1](http://alphasierrawatches.com/cdn/shop/products/ASWPXNO1-2_1ac35278-5545-4da8-b3b3-a749cac3a35e.jpg?v=1673611589&width=1445)
![Alpha Sierra PrototypeX No.1](http://alphasierrawatches.com/cdn/shop/products/ASWPXNO1-3_9a8573fe-6a8d-4cc5-8e5e-d1268287fa8c.jpg?v=1673611589&width=1445)
![Alpha Sierra PrototypeX No.1](http://alphasierrawatches.com/cdn/shop/products/ASWPXNO1-4_c0ff0473-9df4-46d5-8e44-59965755b113.jpg?v=1673611589&width=1445)
![Alpha Sierra PrototypeX No.1](http://alphasierrawatches.com/cdn/shop/products/ASWPXNO1-5_17c5115c-b2a1-442e-aac7-057a5a2c9d18.jpg?v=1673611589&width=1445)
![Alpha Sierra PrototypeX No.1](http://alphasierrawatches.com/cdn/shop/products/ASWPXNO1-6_09057874-8f5e-4850-b6d6-13a15f27fc20.jpg?v=1673611589&width=1445)
![Alpha Sierra PrototypeX No.1](http://alphasierrawatches.com/cdn/shop/products/ASWPXNO1-8_8e06fca3-e411-4979-b9f2-4f173237d06c.jpg?v=1673611589&width=1445)
![Alpha Sierra PrototypeX No.1](http://alphasierrawatches.com/cdn/shop/products/ASWPXNO1-9_45921f82-8957-476f-82e3-cba1c4d00852.jpg?v=1673611590&width=1445)
Specs
-
Movement
Miyota 8217
-
Case material
Stainless steel
-
Diameter in mm
42
-
Thickness in mm
13
-
Water resistance
5 ATM (Rain & Splashproof)
-
Bracelet closure
Butterfly or folding clasp
-
Watch strap length in mm
220
-
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.