Seiko Cal. 5641 - 355

The Seiko 5641-355 represents an important milestone in Seiko's 1972 lineup. It features a Green dial protected by a Sapphire crystal and offers 140m of water resistance. [seikata-wm-86027edbc0ce]

Also known as: Sumo, Shogun

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

15.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Green

Jewels

22j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1972

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