Seiko Cal. 3854 - 634

The Seiko 3854-634 represents an important milestone in Seiko's 1973 lineup. Powered by the 3854 caliber with 21j jewels beating at 28,800 bph, it delivers a 52 hours power reserve. [seikata-wm-a2c0754ba5a4]

Also known as: Bullhead

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

8.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1973

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