Seiko Cal. 3890 - 657

The Seiko 3890-657 represents an important milestone in Seiko's 1995 lineup. Powered by the 3890 caliber with 36j jewels beating at 21,600 bph, it delivers a 43 hours power reserve. [seikata-wm-40a02e65c173]

Also known as: Monster, Sumo

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

39mm

Case Thickness

12.6mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1995

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