Seiko Cal. 5231 - 541

This Hand-Winding model from 1981 features a 40mm Two-Tone case. The Inner Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-408c979a0cd0]

Also known as: Tuna, Rally

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

40mm

Case Thickness

10.0mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Green

Jewels

24j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1981

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