The Chrono hand is a bit of a mystery, watch was purchased from original owner and was never serviced I was told, which by the melted gasket could confirm this. Where and how this hand came to be on the watch is a mystery as it matches the other hands perfectly. It is however a little short in comparison to the ultra chrono hand and the 26.552.XXX serial and serial Oct 30, ‘68 manufacture date seems to late...