Seiko Cal. 3878 - 860

The 3878-860 is a sought-after Automatic piece from Seiko's golden era. Powered by the 3878 caliber with 17j jewels beating at 36,000 bph, it delivers a 46 hours power reserve. [seikata-wm-c9def75c1656]

Also known as: Bullhead

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

36mm

Case Thickness

14.6mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Silver

Jewels

17j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1970

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