Seiko Cal. 4415 - 645

This Spring Drive model from 1984 features a 37mm Titanium case. The Coin-Edge bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-dda7b20afd52]

Also known as: Tuna, Rally

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

37mm

Case Thickness

11.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

White

Jewels

20j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1984

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