Seiko Cal. 3817 - 280

The 3817-280 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3817 caliber with 23j jewels beating at 36,000 bph, it delivers a 36 hours power reserve. [seikata-wm-fe30c2f2ddb8]

Also known as: Turtle

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

14.8mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Green

Jewels

23j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1976

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