Thank you very much!
The maximum variation you measured between positions (24 secs) is perfectly normal for a well kept 321. It might be brought down poising the balance wheel and with a bit of fine tuning, but, evidently, this is not the current Bienne standard.
The graph is quite regular, even if there might be a small problem with the escapement wheel (not sure).
Please notice that the lift angle of caliber 321 is 40 deg and not 52.
This means that the actual amplitude is 250 deg in the horizontal position and 266 in the vertical one (strange).
Overall, from the movement overhauling perspective, the job done appears a good, but not an exceptional one.
Thank you very much again for your contribution.
Cheers,
Maurice
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