Seiko Cal. 3817 - 280

Seiko 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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