Seiko Cal. 6231 - 478

This Hand-Winding model from 1977 features a 35mm Titanium case. Powered by the 6231 caliber with 26j jewels beating at 28,800 bph, it delivers a 64 hours power reserve. [seikata-wm-b3f2f04ddb08]

Also known as: World Timer

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

35mm

Case Thickness

8.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

180m

Dial Color

Silver

Jewels

26j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1977

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