Seiko Cal. 3899 - 757

Seiko 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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