Seiko Cal. 5640 - 641

The 5640-641 is a sought-after Hand-Winding piece from Seiko's golden era. The Rotating bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-3ec97f28d3c2]

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

10.6mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

120m

Dial Color

Burgundy

Jewels

20j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1994

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