Don has never really tried to account for the time used in making a watch or a movement, but once the design is finished he thinks the production comes down to something like this.
To make one movement:
40hrs Preparation: Production drawings, CNC programming, preparing raw material, etc.
40hrs Part production: plate, bridges, springs, keyless works, motion works axles, winding studs, special screws, etc.
32hrs Assembly and adjustment - disassembly
40hrs Part decoration: Finishing to final form, brushing, angling, perlage, côtes de Genève, cerclage, polishing, etc.
16hrs Final assembly and adjustment
Don notes that there is of course also time spent taking the parts for plating (that takes a couple of days until they are finished too). The case, crown, buckle, dial & hands take a little less time to make than the movement. Although his various watch models have some similarities, he's yet to make two of the same watches/movements.
Hope this is informative!
Cheers,
Daos