Seiko Cal. 6636 - 436

This Spring Drive model from 1980 features a 38mm Hardlex-Coated Steel case. The Coin-Edge bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-5e1e666b0c4c]

Also known as: Panda, UFO

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

13.0mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Champagne

Jewels

23j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1980

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