Seiko Cal. 3860 - 178

The 3860-178 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 3860 caliber with 28j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-2c7325561b88]

Also known as: Helmet, Rally

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

9.7mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1998

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