Seiko Cal. 3899 - 525

Seiko 3899-525

The 3899-525 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3899 caliber with 32j jewels beating at 28,800 bph, it delivers a 36 hours power reserve. [seikata-wm-56d38985a996]

Also known as: Sumo, Bellmatic

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
37mm
Case Thickness
10.4mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
140m
Dial Color
Cream
Jewels
32j
Frequency
28,800 bph
Power Reserve
36 hours
Year
1987

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seikata-wm-56d38985a996