Seiko Cal. 4530 - 691

The Seiko 4530-691 represents an important milestone in Seiko's 1968 lineup. Powered by the 4530 caliber with 21j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-d46f2c90e255]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

9.0mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Black

Jewels

21j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1968

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