Seiko Cal. 4531 - 654

The Seiko 4531-654 represents an important milestone in Seiko's 1971 lineup. Powered by the 4531 caliber with 17j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-799975cff10a]

Also known as: Helmet, Navigator

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

9.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

190m

Dial Color

Navy

Jewels

17j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1971

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