Seiko Cal. 3891 - 682

Released in 1975, the Cal. 3891 with design code 682 was part of Seiko's domestic market collection. The Bidirectional bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-300ec2575dba]

Also known as: Monster, Sumo

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

8.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Navy

Jewels

19j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1975

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