Seiko Cal. 4548 - 928

Seiko 4548-928

The 4548-928 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 4548 caliber with 22j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-7ccf64ff1f22]

Also known as: Helmet, Sportsmatic

Specifications

Movement
Kinetic
Case Material
Titanium
Case Width
43mm
Case Thickness
12.8mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
140m
Dial Color
Blue Sunburst
Jewels
22j
Frequency
21,600 bph
Power Reserve
63 hours
Year
1977

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