Seiko Cal. 3859 - 926

The 3859-926 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 3859 caliber with 28j jewels beating at 21,600 bph, it delivers a 54 hours power reserve. [seikata-wm-8ee7b8f3bce5]

Also known as: Tuna, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

43mm

Case Thickness

8.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1965

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