Seiko Cal. 4415 - 638

This Spring Drive model from 1976 features a 36mm Titanium case. Powered by the 4415 caliber with 17j jewels beating at 28,800 bph, it delivers a 37 hours power reserve. [seikata-wm-8d8ee666138f]

Also known as: UFO, Navigator

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

36mm

Case Thickness

14.6mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1976

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