Seiko Cal. 5643 - 540

The Seiko 5643-540 represents an important milestone in Seiko's 1968 lineup. Powered by the 5643 caliber with 28j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-db19a8b9f2af]

Also known as: Pogue

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

44mm

Case Thickness

14.3mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

40m

Dial Color

Black

Jewels

28j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1968

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