Seiko Cal. 5613 - 385

This Spring Drive model from 1980 features a 39mm Titanium case. Powered by the 5613 caliber with 28j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-393df67578c6]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

39mm

Case Thickness

13.6mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1980

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