Seiko Cal. 5640 - 729

Released in 1980, the Cal. 5640 with design code 729 was part of Seiko's domestic market collection. It features a White dial protected by a Sapphire crystal and offers 180m of water resistance. [seikata-wm-be17bc62af95]

Also known as: Rally, Goldfeather

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

10.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

White

Jewels

28j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1980

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