Seiko Cal. 6637 - 225

Seiko 6637-225

The 6637-225 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6637 caliber with 24j jewels beating at 28,800 bph, it delivers a 64 hours power reserve. [seikata-wm-8ab21ab266d5]

Also known as: Baby Tuna, Emperor

Specifications

Movement
Automatic
Case Material
PVD Black
Case Width
35mm
Case Thickness
10.0mm
Lug Width
19mm
Crystal
Acrylic
Bezel
Fixed
Water Resistance
90m
Dial Color
Burgundy
Jewels
24j
Frequency
28,800 bph
Power Reserve
64 hours
Year
1972

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