Seiko Cal. 3899 - 757

The 3899-757 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3899 caliber with 20j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-fcd770772b8f]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

43mm

Case Thickness

12.3mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Black

Jewels

20j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1988

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