Seiko Cal. 4428 - 273

Seiko 4428-273

The Seiko 4428-273 represents an important milestone in Seiko's 1989 lineup. Powered by the 4428 caliber with 27j jewels beating at 36,000 bph, it delivers a 60 hours power reserve. [seikata-wm-648d15140a2d]

Also known as: Sumo, Bullhead

Specifications

Movement
Hand-Winding
Case Material
Gold-Plated
Case Width
36mm
Case Thickness
8.9mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
160m
Dial Color
White
Jewels
27j
Frequency
36,000 bph
Power Reserve
60 hours
Year
1989

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