Seiko Cal. 5641 - 740

Released in 1967, the Cal. 5641 with design code 740 was part of Seiko's domestic market collection. The Coin-Edge bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-7989bf6355bd]

Also known as: Crown

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

42mm

Case Thickness

10.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Silver

Jewels

21j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1967

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