Seiko Cal. 5640 - 536

The Seiko 5640-536 represents an important milestone in Seiko's 1980 lineup. It features a Champagne dial protected by a Mineral crystal and offers 70m of water resistance. [seikata-wm-0c43188dde71]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

13.3mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Champagne

Jewels

35j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1980

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