Seiko Cal. 3878 - 103

The Seiko 3878-103 represents an important milestone in Seiko's 1965 lineup. Powered by the 3878 caliber with 18j jewels beating at 36,000 bph, it delivers a 72 hours power reserve. [seikata-wm-c0bc8b4f70db]

Also known as: Bullhead, World Timer

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

40mm

Case Thickness

9.0mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1965

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