The original 44GS had a three-hand
link manual movement inside but the SBGJ255 opted for the automatic GMT movement Cal. 9S86 which is a
link high-frequency movement ticking at 36000 vph
link while securing approximately 55 hours of power reserve. The uniquely sculpted titanium rotor has been treated with a special anodic oxidation process exhibiting a beautiful deep gold tone that you don't see elsewhere.