Seiko Cal. 5640 - 663

The 5640-663 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5640 caliber with 36j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-8841f2179176]

Also known as: Pogue

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

10.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1985

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