Seiko Cal. 7164 - 645

The Seiko 7164-645 represents an important milestone in Seiko's 1987 lineup. Powered by the 7164 caliber with 21j jewels beating at 28,800 bph, it delivers a 36 hours power reserve. [seikata-wm-590a13be1ac6]

Also known as: Bullhead, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

11.0mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

180m

Dial Color

Green

Jewels

21j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1987

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