Looks like a Silver Appleyard or a Welsh Harlequin.
I gotta ask this though, what are you going to do when you do your breeding stuff and experimenting with different breeds of ducks and then one day you start selling stock and the person that bought stock from you forgets what the breed of bird they are and just goes on the internet and looks around and finds pictures of birds similiar to the ones that person has. Then he starts advertising them as a breed they are not and then breeds them with TRUE breeds and then they breed and etc. you could possibly be polluting a breed of ducks which we have very very few bloodlines for already.