Seiko Cal. 5640 - 465

Released in 1965, the Cal. 5640 with design code 465 was part of Seiko's domestic market collection. With its 20mm lug width and 14.6mm profile, it sits comfortably on most wrists. [seikata-wm-afa241fec289]

Also known as: Sumo, World Timer

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

14.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

170m

Dial Color

Cream

Jewels

36j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1965

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