Seiko Cal. 3891 - 507

The Seiko 3891-507 represents an important milestone in Seiko's 1977 lineup. It features a Black dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-5b5400b9c6ef]

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

46mm

Case Thickness

15.0mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Black

Jewels

28j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1977

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