Seiko Cal. 4561 - 642

The Seiko 4561-642 represents an important milestone in Seiko's 1966 lineup. Powered by the 4561 caliber with 24j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-68508ebf5ec8]

Also known as: Rally, Navigator

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

39mm

Case Thickness

14.2mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Black

Jewels

24j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1966

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