Seiko Cal. 6337 - 399

Seiko 6337-399

The 6337-399 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6337 caliber with 17j jewels beating at 36,000 bph, it delivers a 66 hours power reserve. [seikata-wm-d84930fe0305]

Also known as: Bullhead

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
37mm
Case Thickness
14.7mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
120m
Dial Color
Navy
Jewels
17j
Frequency
36,000 bph
Power Reserve
66 hours
Year
1971

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