Seiko Cal. 5640 - 105

Seiko 5640-105

This Automatic model from 1977 features a 43mm Hardlex-Coated Steel case. With its 20mm lug width and 8.1mm profile, it sits comfortably on most wrists. [seikata-wm-ad8d9023884c]

Also known as: Shogun, Navigator

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
43mm
Case Thickness
8.1mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
110m
Dial Color
Silver
Jewels
24j
Frequency
28,800 bph
Power Reserve
56 hours
Year
1977

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