Seiko Cal. 5644 - 188

The 5644-188 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5644 caliber with 21j jewels beating at 21,600 bph, it delivers a 66 hours power reserve. [seikata-wm-ca9fe25e19f0]

Also known as: Turtle, Rally

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

8.9mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Burgundy

Jewels

21j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1974

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