Seiko Cal. 6638 - 722

Seiko 6638-722

The Seiko 6638-722 represents an important milestone in Seiko's 1981 lineup. Powered by the 6638 caliber with 26j jewels beating at 36,000 bph, it delivers a 48 hours power reserve. [seikata-wm-b0e6f528a259]

Also known as: Silverwave, World Timer

Specifications

Movement
Kinetic
Case Material
Titanium
Case Width
46mm
Case Thickness
8.1mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
80m
Dial Color
White
Jewels
26j
Frequency
36,000 bph
Power Reserve
48 hours
Year
1981

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