Seiko Cal. 6643 - 340

This Hand-Winding model from 1970 features a 40mm Titanium case. It features a Green dial protected by a Mineral crystal and offers 90m of water resistance. [seikata-wm-eb8054e7bbf5]

Also known as: Turtle, Flighty

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

40mm

Case Thickness

10.0mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

90m

Dial Color

Green

Jewels

24j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1970

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