Seiko Cal. 3891 - 366

The Seiko 3891-366 represents an important milestone in Seiko's 1982 lineup. Powered by the 3891 caliber with 30j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-119663941ab5]

Also known as: Helmet, Flighty

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

12.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

30j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1982

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