Seiko Cal. 3851 - 623

Seiko 3851-623

This Hand-Winding model from 1971 features a 35mm Two-Tone case. The Inner Rotating bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-918d3f14e22a]

Also known as: Monster, Baby Tuna

Specifications

Movement
Hand-Winding
Case Material
Two-Tone
Case Width
35mm
Case Thickness
15.5mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
70m
Dial Color
White
Jewels
27j
Frequency
36,000 bph
Power Reserve
63 hours
Year
1971

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