Saturnius,
By definition, an Independent Watchmaker must still be active.
If the watchmaker has retired, died or stopped production, he/she is no longer independent from the "tied" or "tenured" positions with the watch industry.
We won't go into long argued definition of "What is an independent watchmaker?" Suffice to say that the definition of the AHCI is the closest that PuristS follows. An individual artiste createur usually still handmaking the watches.
Regards,
MTF