Seiko Cal. 3878 - 255

The 3878-255 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3878 caliber with 20j jewels beating at 36,000 bph, it delivers a 62 hours power reserve. [seikata-wm-4063a9356c1a]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

13.0mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Champagne

Jewels

20j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1989

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