Keen Kutter Pedal Grindstone

What good's a name like Keen Kutter without including grindstones to keep your tools sharp and "Keen-Kutting"? This is a pedal model usually seen at blacksmith shops and such. This item was not listed in the 1939 catalog, so it's older than that year. This one looks to be in fairly decent shape for its' age. Imagine trying to move one of these things! I bet it was like moving an elephant with that stone! (unless the stone is removable for transporting.)

I have confirmed this is from at least 1912, as it's listed in the catalog from that year