Seiko Cal. 5640 - 601

The 5640-601 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5640 caliber with 27j jewels beating at 21,600 bph, it delivers a 64 hours power reserve. [seikata-wm-aa12595ba37f]

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

8.7mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Black

Jewels

27j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1966

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