Seiko Cal. 5643 - 661

This Hand-Winding model from 1984 features a 34mm Two-Tone case. It features a Navy dial protected by a Mineral crystal and offers 80m of water resistance. [seikata-wm-e1a89492ffcc]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

34mm

Case Thickness

15.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

80m

Dial Color

Navy

Jewels

31j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1984

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