Seiko Cal. 3861 - 507

Seiko 3861-507

This Automatic model from 1991 features a 40mm Hardlex-Coated Steel case. With its 19mm lug width and 12.7mm profile, it sits comfortably on most wrists. [seikata-wm-d5b60d29c099]

Also known as: Monster, Sumo

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
40mm
Case Thickness
12.7mm
Lug Width
19mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
190m
Dial Color
Navy
Jewels
33j
Frequency
36,000 bph
Power Reserve
69 hours
Year
1991

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