Seiko Cal. 4475 - 631

This Automatic model from 1966 features a 38mm Stainless Steel case. Powered by the 4475 caliber with 31j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-59edc56ed1fc]

Also known as: UFO, Bellmatic

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

10.5mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Silver

Jewels

31j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1966

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