Seiko Cal. 3878 - 746

The Seiko 3878-746 represents an important milestone in Seiko's 1991 lineup. Powered by the 3878 caliber with 32j jewels beating at 36,000 bph, it delivers a 61 hours power reserve. [seikata-wm-17ec650ff21b]

Also known as: Sportsmatic

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

9.5mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Green

Jewels

32j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1991

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