This posting on GunBroker.com, references a Parker Reproduction with"Factory Choke Tubes".
http://www.gunbroker.com/Auction/Vie...Item=531042223
I sent a note to the seller asking if the barrel was marked "Sporting Clays". His response was no.
I'm unaware of any Factory Choke Tubes on any other Reproduction than the Sporting Clays model. Is anyone else aware of any other model so equipped?