Seiko Cal. 3878 - 716

The Seiko 3878-716 represents an important milestone in Seiko's 1966 lineup. Powered by the 3878 caliber with 33j jewels beating at 36,000 bph, it delivers a 65 hours power reserve. [seikata-wm-c0e830b3d44a]

Also known as: Sportsmatic, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

15.8mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Black

Jewels

33j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1966

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