Seiko Cal. 6631 - 551

Seiko 6631-551

This Hand-Winding model from 1976 features a 40mm Two-Tone case. The Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-32a41ea9d6a4]

Also known as: Monster

Specifications

Movement
Hand-Winding
Case Material
Two-Tone
Case Width
40mm
Case Thickness
13.2mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
190m
Dial Color
Burgundy
Jewels
35j
Frequency
36,000 bph
Power Reserve
66 hours
Year
1976

Related Models

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