Seiko Cal. 6636 - 423

The 6636-423 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6636 caliber with 25j jewels beating at 21,600 bph, it delivers a 68 hours power reserve. [seikata-wm-60f27f8503f6]

Also known as: Tuna

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

15.4mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1970

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