Seiko Cal. 5618 - 831

Seiko 5618-831

This Hand-Winding model from 1968 features a 40mm Stainless Steel case. The Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-3a81f710a36d]

Also known as: Turtle, Sumo

Specifications

Movement
Hand-Winding
Case Material
Stainless Steel
Case Width
40mm
Case Thickness
15.2mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
70m
Dial Color
Blue Sunburst
Jewels
31j
Frequency
36,000 bph
Power Reserve
47 hours
Year
1968

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