Seiko Cal. 4491 - 231

Released in 1979, the Cal. 4491 with design code 231 was part of Seiko's domestic market collection. Powered by the 4491 caliber with 21j jewels beating at 36,000 bph, it delivers a 38 hours power reserve. [seikata-wm-1c0fa8ffe60c]

Also known as: Flighty

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

9.6mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Green

Jewels

21j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1979

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