Seiko Cal. 6631 - 524

This Automatic model from 1973 features a 39mm Titanium case. Powered by the 6631 caliber with 35j jewels beating at 36,000 bph, it delivers a 57 hours power reserve. [seikata-wm-9c3d84da7b13]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

39mm

Case Thickness

8.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1973

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