Seiko Cal. 7164 - 521

The Seiko 7164-521 represents an important milestone in Seiko's 1979 lineup. Powered by the 7164 caliber with 22j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-5f57d2b413a0]

Also known as: World Timer, Crown

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

12.1mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Black

Jewels

22j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1979

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