Seiko Cal. 5641 - 320

The Seiko 5641-320 represents an important milestone in Seiko's 1978 lineup. It features a Green dial protected by a Hardlex crystal and offers 170m of water resistance. [seikata-wm-87b38ec03c72]

Also known as: Tuna, Arnie

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

12.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Green

Jewels

22j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1978

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