Seiko Cal. 5631 - 597

This Hand-Winding model from 1999 features a 34mm Gold-Plated case. It features a Silver dial protected by a Acrylic crystal and offers 200m of water resistance. [seikata-wm-93e4a5058e62]

Also known as: Tuna, UFO

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

13.4mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Silver

Jewels

33j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1999

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