Seiko Cal. 6637 - 277

Seiko 6637-277

The Seiko 6637-277 represents an important milestone in Seiko's 1984 lineup. Powered by the 6637 caliber with 29j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-3f56454df3a7]

Also known as: Rally, Sportsmatic

Specifications

Movement
Hand-Winding
Case Material
Titanium
Case Width
43mm
Case Thickness
8.5mm
Lug Width
21mm
Crystal
Acrylic
Bezel
Fixed
Water Resistance
80m
Dial Color
Navy
Jewels
29j
Frequency
28,800 bph
Power Reserve
56 hours
Year
1984

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