Seiko Cal. 3861 - 433

The 3861-433 is a sought-after Solar piece from Seiko's golden era. Powered by the 3861 caliber with 21j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-45c2075f5118]

Also known as: Tuna, Sportsmatic

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

14.2mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1983

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