Seiko Cal. 3898 - 648

The Seiko 3898-648 represents an important milestone in Seiko's 1975 lineup. Powered by the 3898 caliber with 17j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-8299531af8a3]

Also known as: Sportsmatic

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

13.5mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

White

Jewels

17j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1975

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