Seiko Cal. 7028 - 638

Seiko 7028-638

The Seiko 7028-638 represents an important milestone in Seiko's 1989 lineup. Powered by the 7028 caliber with 33j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-ff8b0e8ed1d3]

Also known as: Arnie

Specifications

Movement
Solar
Case Material
Stainless Steel
Case Width
37mm
Case Thickness
14.3mm
Lug Width
21mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
110m
Dial Color
Burgundy
Jewels
33j
Frequency
28,800 bph
Power Reserve
50 hours
Year
1989

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