Seiko Cal. 5663 - 636

Seiko 5663-636

This Automatic model from 1971 features a 45mm PVD Black case. With its 18mm lug width and 12.7mm profile, it sits comfortably on most wrists. [seikata-wm-a3a2d465cf7f]

Also known as: Sumo

Specifications

Movement
Automatic
Case Material
PVD Black
Case Width
45mm
Case Thickness
12.7mm
Lug Width
18mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
100m
Dial Color
Silver
Jewels
30j
Frequency
21,600 bph
Power Reserve
66 hours
Year
1971

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