Seiko Cal. 3866 - 971

The 3866-971 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 3866 caliber with 29j jewels beating at 21,600 bph, it delivers a 41 hours power reserve. [seikata-wm-aecc673311bb]

Also known as: Turtle

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

45mm

Case Thickness

8.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Silver

Jewels

29j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1972

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