This is what the UK breeder has to say about the GDW roo pictured by the OP.
Dear Robin
I am getting lots of interest from the US on my Gold Duckwing Welsummer.
The bird shown on "Backyard Poultry" does look similar to my GDW but the markings are much more ill defined and his comb and wattles do not look very correct. It is difficult to tell from just one photograph.
The following I replied to another enquirer and may be of interest: I should point out to you that the Welsummer Club of Great Britain is in some turmoil over the Gold Duckwing Welsummer and as such it is not an officially recognised breed. The clubs yearbook, published last month, has an article featuring my Prize Cock "Don Vito" as I call him and asking members to join in a discussion as to whether the Gold Duckwing Welsummer GDW should be recognised and have a standard written for them. At this time the club only recognises the Standard Partridge Welsummer and also the Silver Duckwing and they are in turmoil. The main problem is that the Duckwing breeds do not retain the very dark terracotta coloured eggs of the standatd partridge. There is debate as to whether to outlaw both breeds of Duckwing from the club and standard to prevent the dilution of the Standard Breed.So a decision has not yet been reached and I would guess it will be years before they arrive at one. I am in fact undertaking some research myself to try to establish how the GDW is bred as there is also a lot of discussion on this point. My Cock Bird at the moment and all this year has been running with seven hens, five partridge and two duckwing and approximately half of the chicks hatched are Duckwing and half Partridge. As you can see from this, half of the offspring from this pairing is Partridge and looks exactly like the standard bird. The problem lies in the fact that its father is a GDW and therefore it has his genes and can pass them on to their offspring thus diluting the purity of the breed.
Best Regards
Roger Mudditt
So that is his opinion of the OP's questionable "Welsummer". I am looking forward in seeing more responses from the UK GDW breeders.
Thank you everyone for your responses. I do understand and I also have emailed Mr. Mudditt and he was very informative. I again really appreciate all your responses. He may be a mix breed of a welsummer and something else.
I really thought we had figured what exactly he is. I am a very proud owner of him and he is a wonderful roo, he does not tolerate his hens fighting among them. I do plan on breeding him with some welsummer hens and see what I get. I know that one of the hens we hatched out of his line looked exactly like a welsummer hen.
Some of the other roosters we have hatched (bred with him and california whites hens), were very beautiful (I don't have pics of). I will post pictures next year of the ones we hatch out from him. I also have a beautiful California White Rooster who I have raised since 2 days old.
We also own Astrolaups, Cinnamon Quens, Rhode Island Reds, Barred Rocks, California Whites.
To answer some of the questions:
I am located here in Missouri and we got him from a friend who gave us a welsummer rooster with him.
He was the Grand Champion of our local farm show, (my daughter showed him.)
He actually has Red Eyes and white feathers over his ears.
His legs are usually pinkish/yellow.