Seiko Cal. 3856 - 399

The 3856-399 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3856 caliber with 30j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-740e3c18c4d0]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

15.7mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

150m

Dial Color

Blue Sunburst

Jewels

30j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1988

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