I will really like to get some more input about youre Experiencs with true Tourbillon containing reps...
Movement info:
The PTS 3900 tourbillon (Hangzhou Watch Co) has double-mainspring found in at least one AP replica. There is also a PTS 3310 tourbillon (maybe this is in the JLC regulateur replica?) and a Dixmont-Guangzhou DG81 (also sold by PTS Resources)has auto-winding (which should produce much the same effect by keeping the mainspring at optimum tension so long as the watch is worn). Sea-Gull has the ST80 tourbillon (and Sea-Gull ST8007SA). The ST80 is also available with auto-winding...more?