Seiko Cal. 6143 - 721

The Seiko 6143-721 represents an important milestone in Seiko's 1978 lineup. It features a Black dial protected by a Acrylic crystal and offers 120m of water resistance. [seikata-wm-10cacc47c078]

Also known as: World Timer

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

37mm

Case Thickness

13.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Black

Jewels

17j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1978

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