As Leroy said - McCormick Deering enclosed gear
side delivery rake (4 bar).
That's what they're called - there's no model
number or anything like that.
They did have various options, ours has rubber
tires. You could also get a seat for pulling with
horses, and there are different sprockets to
change the speed of the "cylinder" - the main
spinning assembly.
Sprockets could have 8,9,10,or 11 teeth. Might
want to count yours just so you know where you are
in that spectrum.
Slower sprockets are for light fluffy crops -
faster for heavy crops. Also to compensate for
horse drawn vs. tractor drawn.
I hate to keep posting this picture over and over
again - but the topic comes up a lot.
I run a 4H club, and the kids restored this one.
I love using the thing. I think it was well worth
the effort to save them. It really works very
well. Ours doesn't leave a piece of hay behind -
it scours like no other rake I've ever used.
Of course it's not the right tool for doing high
production, and yeah it's a little awkward in
tight spaces, but for say a 5 acre field - it's
really nice. Especially when it's set up right
and you've got all the teeth away from the
strippers so it runs silently.
Leroy's right too - that gear box fills right up
with water, keep an eye on it, because if it gets
very rusty in there, it can cause with the
cage/roller bearings.
One other thing I'd add, this rake probably isn't
for you if you can't weld. Those stripper bars
break pretty easily, and it could get frustrating
if you can't fix them yourself.