Seiko Cal. 5640 - 271

Released in 1983, the Cal. 5640 with design code 271 was part of Seiko's domestic market collection. It features a Cream dial protected by a Hardlex crystal and offers 170m of water resistance. [seikata-wm-78c72eaac3c5]

Also known as: Rally, Emperor

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

43mm

Case Thickness

15.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Cream

Jewels

22j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1983

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