Seiko Cal. 3816 - 104

The 3816-104 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3816 caliber with 33j jewels beating at 21,600 bph, it delivers a 45 hours power reserve. [seikata-wm-a7ac69c4ff43]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

8.7mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Cream

Jewels

33j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1983

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