Seiko Cal. 5640 - 551

The 5640-551 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5640 caliber with 28j jewels beating at 21,600 bph, it delivers a 48 hours power reserve. [seikata-wm-b33dd0983e5f]

Also known as: Panda

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

13.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

100m

Dial Color

Black

Jewels

28j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1984

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