Seiko Cal. 6635 - 238

The Seiko 6635-238 represents an important milestone in Seiko's 1971 lineup. It features a Black dial protected by a Sapphire crystal and offers 120m of water resistance. [seikata-wm-536faa21e3ae]

Also known as: Tuna

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

8.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

120m

Dial Color

Black

Jewels

24j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1971

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