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SBDC031

SBDC031 Automatic Watch

The Seiko Prospex SBDC031 "Sumo" is a 45mm men's automatic watch with a stainless steel case and a black analog dial protected by hardlex crystal. It uses a 6R15 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 50 hours when fully wound and will self-wind when moved.

Specifications
Model nr. SBDC031
Brand Seiko
Gender Men's
Movement
Type Automatic
Caliber 6R15
Beats per Hour 21,600 bph
Manual Winding Yes
Hacking Yes
Power Reserve 50 Hours
Instructions Owner's Manual
Case
Crown Position 04:00
Case Width (mm) 45
Case Thickness (mm) 14
Case Shape Round
Case Material Stainless Steel
Crystal Material Hardlex
Water Resistance (meters) 200
Screw Down Crown Yes
Second Crown No
Complications
Moonphase No
Date Window Yes
Time Types Hours, Minutes, Seconds
Band
Band Material Stainless Steel
Band Color Silver
Replaceable Band Yes
Band Width (mm) 20
Dial
Dial Color Black
Hour Markings Circles, Triangles
Bezel
Bezel Function Unidirectional
Bezel Material Stainless Steel
Bezel Color Black
On the Bezel Minute Numbering
Inner Bezel
Inner Bezel Color Black
On Inner Bezel Bars
Hand Colors
Hour Hand Silver
Minute Hand Silver
Second Hand Silver