Seiko Cal. 7131 - 633

Seiko 7131-633

This Hand-Winding model from 1988 features a 41mm Two-Tone case. The Inner Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-9ee41e788d6d]

Also known as: Bullhead

Specifications

Movement
Hand-Winding
Case Material
Two-Tone
Case Width
41mm
Case Thickness
13.7mm
Lug Width
20mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
130m
Dial Color
Cream
Jewels
20j
Frequency
21,600 bph
Power Reserve
44 hours
Year
1988

Related Models

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