I actually live a couple miles from Eldridge IA, I can do some asking around about the tool company. I'm sure some farmer around has to have some information :)
I have no idea what these are worth, I got these in a box of old tools from my father in law.
$45 or best offer.
(Added price)
Also I am in Iowa
-Brett
Most definately, we vacation in Northern Minnesota and it is quite common for this. They have ramps with a winch setup that pulls them up out of the water into a "garage" on the shore. Nice way to get ready for winter.