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42  43 G.P.M.H.  All movements powering  the Classic Racing collection  are chronometer-certified  by the COSC (Swiss Official  Chronometer Testing Institute).  G.P.M.H. Chrono  Ref. 168570-3001 Material Stainless steel   and titanium  Ø 44.50 mm Movement Self-winding Certification Chronometer   certificate (COSC) Power reserve 46 hours Frequency 28,800 vibrations   per hour (4 Hz)  G.P.M.H. Chrono  Ref. 158570-30
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