Try asking this question at one of the dedicated machining forums, such as Homworkshop BBS or Practical Machinist. Some guys over there restore old machines as a hobby.
It looks like a horizontal miller similar to the Atlas, Sheldon, rockford.
Wow, that puppy is OLD!! Yes, it's a small horizontal mill. Looks almost as if it's set up dedicated for using with an arbor saw. Most horizontal mills can be set up with an arbor as this one is, but usually they (the bigger ones, anyway) are set up with a Morse taper tool holder, so you can use end mills, drill chucks, etc. just like a vertical mill. My guess is that machine probably saw the Great Depression, or at least WWII. You can bet it wasn't made in China though!