One Rheostat from K-L heater from the 50s. The rheostat has all its contact leaves and springs set OK. The knob is good.  So this will get your heater up and running.

Or you could use it on another system. It appears to have multiple functions including two spring windings.. 

The inside is clean and electrically sound. The spring leaves are very firm against the windings which is needed for the current. The feel of the leaves for "varying" over the coils is very smooth and clean. The detents for "full" and "off" are clear and firm. It has a good clean firm feel to it. The contact-spring-leaves are flat against the coils. 

To look for items in my shop, the easiest way is to save any one of MY 1400 items in your watchlist... Then,  whenever you want to peruse my 1400 items... simply click on the hyperlink called “visit store” at the top right of this item.  That will take you to a page with my 40 store categories... click the category,  and that category will be displayed with photos on the right... thus a “window-shop”.

Plodding through the Ebay mire of the general search box... or the “see other items” hyperlink  is simply the way to insanity.

If you’re using Ebay’s useless mobile app, I’m sorry... I have no idea how you will find them… this app is a real shocker/compromise in quality and half the stuff is missing. Go to your PC is my advice