Seiko Cal. 3871 - 439

The Seiko 3871-439 represents an important milestone in Seiko's 1978 lineup. Powered by the 3871 caliber with 28j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-6e454bcd3d5c]

Also known as: Emperor

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

12.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Cream

Jewels

28j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1978

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