Seiko Cal. 7021 - 109

The Seiko 7021-109 represents an important milestone in Seiko's 1976 lineup. Powered by the 7021 caliber with 36j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-7aa79e4bb005]

Also known as: Helmet, World Timer

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

34mm

Case Thickness

10.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Green

Jewels

36j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1976

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