Seiko Cal. 3866 - 138

The Seiko 3866-138 represents an important milestone in Seiko's 1977 lineup. Powered by the 3866 caliber with 18j jewels beating at 36,000 bph, it delivers a 63 hours power reserve. [seikata-wm-de8d6f38d09d]

Also known as: Panda

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

10.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

40m

Dial Color

Green

Jewels

18j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1977

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