Seiko Cal. 3866 - 237

The 3866-237 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3866 caliber with 18j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-79e34d2663fb]

Also known as: Turtle, Silverwave

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

39mm

Case Thickness

14.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

White

Jewels

18j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1965

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