Seiko Cal. 6653 - 387

Seiko 6653-387

The 6653-387 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6653 caliber with 31j jewels beating at 36,000 bph, it delivers a 37 hours power reserve. [seikata-wm-1e4bf33f732b]

Also known as: Bullhead, Bellmatic

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
36mm
Case Thickness
12.7mm
Lug Width
18mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
70m
Dial Color
Black
Jewels
31j
Frequency
36,000 bph
Power Reserve
37 hours
Year
1974

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