Seiko Cal. 3878 - 938

The Seiko 3878-938 represents an important milestone in Seiko's 1965 lineup. Powered by the 3878 caliber with 34j jewels beating at 36,000 bph, it delivers a 39 hours power reserve. [seikata-wm-147739e70936]

Also known as: Sumo, UFO

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

44mm

Case Thickness

10.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Silver

Jewels

34j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1965

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