Seiko Cal. 3891 - 830

The Seiko 3891-830 represents an important milestone in Seiko's 1978 lineup. Powered by the 3891 caliber with 22j jewels beating at 21,600 bph, it delivers a 39 hours power reserve. [seikata-wm-fa34fd31c6d5]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

15.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Champagne

Jewels

22j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1978

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