Seiko Cal. 5615 - 939

This Spring Drive model from 1971 features a 44mm Titanium case. With its 20mm lug width and 15.7mm profile, it sits comfortably on most wrists. [seikata-wm-59c5168a1d4d]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

44mm

Case Thickness

15.7mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Navy

Jewels

32j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1971

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