Seiko Cal. 3878 - 193

The 3878-193 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3878 caliber with 21j jewels beating at 36,000 bph, it delivers a 47 hours power reserve. [seikata-wm-7d34946085c0]

Also known as: Sumo, Helmet

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

11.3mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

120m

Dial Color

Silver

Jewels

21j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1979

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