Seiko Cal. 6664 - 633

The Seiko 6664-633 represents an important milestone in Seiko's 1975 lineup. Powered by the 6664 caliber with 25j jewels beating at 28,800 bph, it delivers a 61 hours power reserve. [seikata-wm-3705bfc57e8a]

Also known as: Shogun, Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

10.5mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

50m

Dial Color

Cream

Jewels

25j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1975

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