Seiko Cal. 5664 - 940

The 5664-940 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5664 caliber with 24j jewels beating at 36,000 bph, it delivers a 60 hours power reserve. [seikata-wm-6bfcec88dac3]

Also known as: Turtle, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

38mm

Case Thickness

11.4mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Navy

Jewels

24j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1980

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