Seiko Cal. 5640 - 323

Released in 1978, the Cal. 5640 with design code 323 was part of Seiko's domestic market collection. Powered by the 5640 caliber with 25j jewels beating at 28,800 bph, it delivers a 48 hours power reserve. [seikata-wm-aa872bff2729]

Also known as: Shogun, Emperor

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

11.4mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1978

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