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SRP637

SRP637 Automatic Watch

The Seiko SRP637 is a 47mm men's automatic watch with a stainless steel case and a black-gray analog dial protected by hardlex crystal. It uses a 4R36 caliber self-winding mechanical movement that can be manually wound and hacked (the second hand stops when the crown is pulled out). It ticks 6 times per second which gives the second hand a smoother movement than a quartz watch which ticks once per second. The watch should run for up to 41 hours when fully wound and will self-wind when moved.

Specifications
Model nr. SRP637
Brand Seiko
Gender Men's
Movement
Type Automatic
Caliber 4R36
Beats per Hour 21,600 bph
Manual Winding Yes
Hacking Yes
Power Reserve 41 Hours
Instructions Owner's Manual
Case
Crown Position 04:00
Case Width (mm) 47
Case Thickness (mm) 14
Case Shape Round
Case Material Stainless Steel
Case Code 03Z0
Crystal Material Hardlex
Water Resistance (meters) 200
Screw Down Crown Yes
Second Crown No
Complications
Moonphase No
Day Window Yes
Date Window Yes
Time Types Hours, Minutes, Seconds
Band
Band Material Stainless Steel
Band Color Silver
Replaceable Band Yes
Band Width (mm) 22
Dial
Dial Color Black, Gray
Hour Markings Bars, Triangles
Bezel
Bezel Function Unidirectional
Bezel Material Stainless Steel
Bezel Color Silver
On the Bezel Minute Numbering
Inner Bezel
Inner Bezel Color Black, Gray
On Inner Bezel Bars
Hand Colors
Hour Hand White
Minute Hand White
Second Hand Gray, White