Seiko Cal. 5640 - 671

This Hand-Winding model from 1967 features a 41mm PVD Black case. With its 22mm lug width and 10.8mm profile, it sits comfortably on most wrists. [seikata-wm-0136b8136814]

Also known as: Turtle

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

41mm

Case Thickness

10.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Cream

Jewels

20j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1967

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