Seiko Cal. 6140 - 680

The Seiko 6140-680 represents an important milestone in Seiko's 1978 lineup. It features a Black dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-57449d51c8a9]

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

34mm

Case Thickness

11.0mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

40m

Dial Color

Black

Jewels

34j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1978

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