Seiko Cal. 3860 - 266

The 3860-266 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3860 caliber with 33j jewels beating at 21,600 bph, it delivers a 51 hours power reserve. [seikata-wm-aab0c866c82f]

Also known as: Tuna, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

14.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Navy

Jewels

33j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1966

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