Seiko Cal. 4491 - 830

The Seiko 4491-830 represents an important milestone in Seiko's 1975 lineup. Powered by the 4491 caliber with 17j jewels beating at 28,800 bph, it delivers a 46 hours power reserve. [seikata-wm-429977d58969]

Also known as: Helmet, Silverwave

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

9.1mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

120m

Dial Color

Silver

Jewels

17j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1975

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