Seiko Cal. 5640 - 143

The 5640-143 is a sought-after Spring Drive piece from Seiko's golden era. It features a White dial protected by a Sapphire crystal and offers 120m of water resistance. [seikata-wm-d53605b241d6]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

35mm

Case Thickness

15.9mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

White

Jewels

26j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1984

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