Seiko Cal. 3891 - 787

The Seiko 3891-787 represents an important milestone in Seiko's 1975 lineup. The Inner Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-8d21ae8cef2a]

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

11.2mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Green

Jewels

20j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1975

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