Great!
About modern reps accepting gen crystal, i guess tw best, tc, etaswiss, wm9 Sub, noob exII (discontinued and gen does not have AR), GmtIIc, etaswiss YM and WM9 YM.
No clue about 116610 but I doubt.
Probably 116200 too, but gen does not have AR, at least my z serial.
The only thing i don't understand is why upgrading a 16800 168000 16200 or early pre V serial 16610