He looks like a Silky puppy to me. But it's so hard to tell. I tend to think my Jackson is a Silky Terrier or Silky/Yorkie, and I've had 5 reputable Silky breeders tell me the same thing. Who knows! Badly-bred Yorkie, or Silky, who cares, he's a total cutie!
Here's good comparisons:
Amron Silky Terriers: More Information