Most, if not all, of the Parker Reproduction brochures listed what we call Quail chokes as SK1 and SKll.
http://parkerguns.org/forums/album.p...pictureid=1021
I seem to recall that there was a period of time when the guns were stamped SK1 and SKll (or was it SK2? As I haven't seen one 1st hand myself) and then changed to the Quail (Q) designation for greater market appeal.