Seiko Cal. 4550 - 727

Seiko 4550-727

This Automatic model from 1988 features a 37mm Titanium case. With its 19mm lug width and 8.7mm profile, it sits comfortably on most wrists. [seikata-wm-0779f4eee93d]

Also known as: Tuna, Sportsmatic

Specifications

Movement
Automatic
Case Material
Titanium
Case Width
37mm
Case Thickness
8.7mm
Lug Width
19mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
150m
Dial Color
Green
Jewels
23j
Frequency
28,800 bph
Power Reserve
60 hours
Year
1988

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