Seiko Cal. 3840 - 845

The 3840-845 is a sought-after Automatic piece from Seiko's golden era. The Fixed bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-39bc53ad856f]

Also known as: Sumo, Bullhead

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

12.9mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

170m

Dial Color

Navy

Jewels

23j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1980

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