Seiko Cal. 3897 - 878

The Seiko 3897-878 represents an important milestone in Seiko's 1968 lineup. Powered by the 3897 caliber with 18j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-88a057069ad6]

Also known as: Sportsmatic, Arnie

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

34mm

Case Thickness

12.5mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Green

Jewels

18j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1968

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