Seiko Cal. 3870 - 658

The 3870-658 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 3870 caliber with 35j jewels beating at 21,600 bph, it delivers a 60 hours power reserve. [seikata-wm-e09dc7ceb92c]

Also known as: World Timer, Sea Horse

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

42mm

Case Thickness

13.2mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Cream

Jewels

35j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1982

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