Tiny Little Porcelain Terrier Figurine.  I don't know what breed- he's so small...  Maybe a Wire Haired Fox or maybe a Scotty...  I'd love to hear what you think he is (or if you know, please let me in on the info).  He looks ready to play.
No makers mark.  He is old, but not sure of age.  No crazing.  Has a rough area near his mold hole from when he was made and a small black dot near his nose, also from when he was made- otherwise looks perfect.  About 1 1/2 inches long and almost 1 inch tall (floor to tip of tail).