Seiko Cal. 3866 - 238

The Seiko 3866-238 represents an important milestone in Seiko's 1966 lineup. Powered by the 3866 caliber with 29j jewels beating at 28,800 bph, it delivers a 64 hours power reserve. [seikata-wm-657d00ab6d76]

Also known as: Sportsmatic, Golden Tuna

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

15.2mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Burgundy

Jewels

29j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1966

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