Seiko Cal. 3891 - 797

The Seiko 3891-797 represents an important milestone in Seiko's 1973 lineup. Powered by the 3891 caliber with 23j jewels beating at 21,600 bph, it delivers a 53 hours power reserve. [seikata-wm-ee6f9cd78065]

Also known as: Helmet, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

10.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

170m

Dial Color

Champagne

Jewels

23j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1973

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