Seiko Cal. 3891 - 401

The Seiko 3891-401 represents an important milestone in Seiko's 1966 lineup. It features a Navy dial protected by a Mineral crystal and offers 130m of water resistance. [seikata-wm-273e1e7a7ae9]

Also known as: Sumo, UFO

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

11.7mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Navy

Jewels

20j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1966

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