Seiko Cal. 0731 - 502

This Spring Drive model from 1986 features a 46mm Titanium case. Powered by the 0731 caliber with 36j jewels beating at 21,600 bph, it delivers a 54 hours power reserve. [seikata-wm-e2374d1e1881]

Also known as: Golden Tuna, Arnie

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

46mm

Case Thickness

12.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Navy

Jewels

36j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1986

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