Seiko Cal. 7181 - 770

This Quartz model from 1967 features a 36mm Hardlex-Coated Steel case. Powered by the 7181 caliber with 33j jewels beating at 36,000 bph, it delivers a 41 hours power reserve. [seikata-wm-6ee13a64e69c]

Also known as: Tuna, Helmet

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

11.2mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

200m

Dial Color

Black

Jewels

33j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1967

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