Seiko Cal. 3861 - 220

The 3861-220 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3861 caliber with 31j jewels beating at 36,000 bph, it delivers a 52 hours power reserve. [seikata-wm-ef549cf6a14d]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

8.1mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Burgundy

Jewels

31j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1997

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