Seiko Cal. 6638 - 277

Seiko 6638-277

The Seiko 6638-277 represents an important milestone in Seiko's 1970 lineup. Powered by the 6638 caliber with 35j jewels beating at 21,600 bph, it delivers a 54 hours power reserve. [seikata-wm-896e5fb125ac]

Also known as: Baby Tuna, Emperor

Specifications

Movement
Kinetic
Case Material
PVD Black
Case Width
35mm
Case Thickness
15.8mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
130m
Dial Color
Burgundy
Jewels
35j
Frequency
21,600 bph
Power Reserve
54 hours
Year
1970

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