Seiko Cal. 5640 - 624

The Seiko 5640-624 represents an important milestone in Seiko's 1978 lineup. It features a Green dial protected by a Mineral crystal and offers 160m of water resistance. [seikata-wm-ac4d22cafc49]

Also known as: Tuna, Arnie

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

11.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Green

Jewels

33j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1978

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