Seiko Cal. 3851 - 907

The Seiko 3851-907 represents an important milestone in Seiko's 1998 lineup. The Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-da4f31cdaa38]

Also known as: Sumo, Helmet

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

40mm

Case Thickness

13.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1998

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