Seiko Cal. 4581 - 637

Seiko 4581-637

This Hand-Winding model from 1972 features a 42mm Hardlex-Coated Steel case. With its 20mm lug width and 14.8mm profile, it sits comfortably on most wrists. [seikata-wm-233416d8d344]

Also known as: Samurai, World Timer

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
42mm
Case Thickness
14.8mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
140m
Dial Color
White
Jewels
35j
Frequency
28,800 bph
Power Reserve
56 hours
Year
1972

Related Models

seikata-wm-233416d8d344