Seiko Cal. 6331 - 872

Seiko 6331-872

The 6331-872 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6331 caliber with 24j jewels beating at 36,000 bph, it delivers a 38 hours power reserve. [seikata-wm-dead77bf4e5f]

Also known as: UFO, Bellmatic

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
42mm
Case Thickness
15.5mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
80m
Dial Color
Silver
Jewels
24j
Frequency
36,000 bph
Power Reserve
38 hours
Year
1976

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