Seiko Cal. 0770 - 923

The Seiko 0770-923 represents an important milestone in Seiko's 1987 lineup. Powered by the 0770 caliber with 30j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-077fd06fd771]

Also known as: Monster

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

11.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

White

Jewels

30j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1987

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