Before fitting the dial and hands, a check is made for chrono creep which is when the hour recorder turns even when the chronograph is off.  The chronograph is worked some times and usually a spare hand would be fitted to the hour recorder but in this case, the wheel already has a convenient scribed mark (in red).  The watch is left running with the chrono off for 24 hours to see if there is any rotation of this wheel.

UK watchmaker showing service of Omega Speedmaster - dial side showing hour chrono creep check

All is fine with that so, the hour wheel and dial washer are fitted.

UK watchmaker showing service of Omega Speedmaster - dial side showing hour wheel fitted

And then the dial and hands.  It appears the chrono second hand is not exactly aligned but that is just a slight angle on the photograph.

UK watchmaker showing service of Omega Speedmaster - dial side showing dial and hands fitted

The movement ring is re-fitted and the movement is ready to be re-cased.

UK watchmaker showing service of Omega Speedmaster - movement ring re-fitted

The movement is ready to be re-fitted to the case.