Seiko Cal. 5666 - 400

The 5666-400 is a sought-after Spring Drive piece from Seiko's golden era. The Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-6454a832d86a]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

40mm

Case Thickness

12.4mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

150m

Dial Color

Green

Jewels

26j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1975

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