Seiko Cal. 5643 - 170

The Seiko 5643-170 represents an important milestone in Seiko's 1967 lineup. It features a Black dial protected by a Sapphire crystal and offers 180m of water resistance. [seikata-wm-7e3307d2a2af]

Also known as: Sumo, Sea Horse

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

11.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Black

Jewels

30j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1967

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