Seiko Cal. 5645 - 631

This Spring Drive model from 1992 features a 40mm Gold-Plated case. It features a Green dial protected by a Sapphire crystal and offers 90m of water resistance. [seikata-wm-63716c240f30]

Also known as: Sumo, Shogun

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

10.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

90m

Dial Color

Green

Jewels

20j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1992

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