Pictured is a restored movement from a French marble clock with a visible brocot deadbeat escapement which has just been finished and light power applied to the main springs. It has been placed on a movement stand and as you can see it is tripping through without the pendulum and at a precarious angle, not only is it tripping through it is releasing the striking mechanism without stopping the clock. 
This shows that if this escapement is properly set up, pivots and bushes polished and burnished correctly and lubricated correctly as much friction from the train has been removed, how well these French movements work. This can be achieved with most good quality movements provided no poor amateur repairer has got to it. 
Regards 
Izzy 
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