Seiko Cal. 6636 - 825

This Hand-Winding model from 1977 features a 37mm Stainless Steel case. It features a Black dial protected by a Sapphire crystal and offers 40m of water resistance. [seikata-wm-9836038d8087]

Also known as: Turtle, UFO

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

8.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Black

Jewels

26j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1977

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