Seiko Cal. 3878 - 181

The 3878-181 is a sought-after Automatic piece from Seiko's golden era. Powered by the 3878 caliber with 20j jewels beating at 36,000 bph, it delivers a 36 hours power reserve. [seikata-wm-501ac7cd4bb1]

Also known as: Tuna, Baby Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

37mm

Case Thickness

10.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Cream

Jewels

20j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1986

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