Seiko Cal. 3816 - 477

The 3816-477 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3816 caliber with 20j jewels beating at 36,000 bph, it delivers a 72 hours power reserve. [seikata-wm-19d14b529fa5]

Also known as: Tuna, Panda

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

45mm

Case Thickness

13.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1965

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