Where'd these figures come from?

I stumbled across a bag of miniatures (presumably for D&D) in a secondhand shop recently, and for three bucks I had to scoop them up.

All the castings exude an old-school vibe. There's this dwarf on a throne:

And a pair of halfling scouts, that looks familiar, but I just can't place it:

As well as another dwarf, with spear and shield:

Along with two more short guys, dwarves or gnomes:

Any idea as to manufacturer or range? I'm curious about where these guys originated.