Seiko Cal. 5640 - 910

The 5640-910 is a sought-after Automatic piece from Seiko's golden era. The Coin-Edge bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-4226dbd6c8e5]

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

45mm

Case Thickness

10.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Cream

Jewels

18j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1972

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