Seiko Cal. 3870 - 431

The Seiko 3870-431 represents an important milestone in Seiko's 1993 lineup. Powered by the 3870 caliber with 17j jewels beating at 28,800 bph, it delivers a 65 hours power reserve. [seikata-wm-e6e3eb09616f]

Also known as: Sumo, Navigator

Specifications

Movement

Solar

Case Material

Titanium

Case Width

45mm

Case Thickness

10.2mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Cream

Jewels

17j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1993

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