Seiko Cal. 6638 - 786

Seiko 6638-786

The 6638-786 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6638 caliber with 22j jewels beating at 21,600 bph, it delivers a 59 hours power reserve. [seikata-wm-d7c96956c83a]

Also known as: Bullhead

Specifications

Movement
Kinetic
Case Material
Stainless Steel
Case Width
45mm
Case Thickness
11.0mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
40m
Dial Color
Burgundy
Jewels
22j
Frequency
21,600 bph
Power Reserve
59 hours
Year
1975

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