He looks Silver partridge... with better black that you see on many partridges,especially silvers.
However, is there mahogany red showing in the tips of his neck hackles?
Anyway, You could just send him to my house... I have two lovely hens that might like to meet him. I know I would sure like them to! LOL
I'm ever on the search for lovely moorheads. I got two silver partridge hens sort of by accident when getting some standard red partridges, and I just love them!