Seiko Cal. 5642 - 540

The Seiko 5642-540 represents an important milestone in Seiko's 1968 lineup. It features a Green dial protected by a Acrylic crystal and offers 40m of water resistance. [seikata-wm-20d375dc99b9]

Also known as: Pogue, Helmet

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

15.2mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Green

Jewels

33j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1968

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