Seiko Cal. 6636 - 810

The Seiko 6636-810 represents an important milestone in Seiko's 1981 lineup. It features a Green dial protected by a Acrylic crystal and offers 90m of water resistance. [seikata-wm-4684daccdb56]

Also known as: Sportsmatic, Arnie

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

9.1mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Green

Jewels

35j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1981

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