Seiko Cal. 6131 - 539

This Hand-Winding model from 1976 features a 46mm Titanium case. Powered by the 6131 caliber with 24j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-bebe0a40bd4e]

Also known as: Turtle

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

46mm

Case Thickness

13.9mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Navy

Jewels

24j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1976

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