Seiko Cal. 3857 - 723

The Seiko 3857-723 represents an important milestone in Seiko's 1977 lineup. The Rotating bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-f5400636b163]

Also known as: Sumo, Crown

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

11.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

170m

Dial Color

Black

Jewels

25j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1977

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