Seiko Cal. 5621 - 742

The Seiko 5621-742 represents an important milestone in Seiko's 1979 lineup. It features a Navy dial protected by a Acrylic crystal and offers 30m of water resistance. [seikata-wm-0ec7ab1567bf]

Also known as: Sumo, Silverwave

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

35mm

Case Thickness

15.0mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

30m

Dial Color

Navy

Jewels

17j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1979

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