Seiko Cal. 3899 - 278

The Seiko 3899-278 represents an important milestone in Seiko's 1975 lineup. Powered by the 3899 caliber with 31j jewels beating at 28,800 bph, it delivers a 64 hours power reserve. [seikata-wm-0471527327d4]

Also known as: Monster, Flighty

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

10.5mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

31j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1975

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