Seiko Cal. 3817 - 153

The 3817-153 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3817 caliber with 20j jewels beating at 28,800 bph, it delivers a 46 hours power reserve. [seikata-wm-9b2fc21f35af]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

13.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

100m

Dial Color

Black

Jewels

20j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1971

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