I'll try another.
thanks

you are trying to do situation 1, described here:
https://www.democraticunderground.com/103659987

a little smaller. The one I have has about 3 more rows of numbers.

Mine is not.

We used to have one of those!

We called it Black Bart.

My husband finally gave it away to a pre-school. The kids could not destroy it and they played endlessly with it.

Cost me five bucks, scrape value.

Since it’s not electric.

I got my best ever deal on LP records at an Amish barn sale. Got 90 records all in mint to almost mint. Many were promotional, not for sale records. Some never opened or played, all from the early 80s. She a dollar apiece on them and I offered $40 for all. Go figure.

if they weren't going to turn around and sell it.

One I gave to an Amish greenhouse. She stills uses it all the time.

The other I gave to a store that sold fabric for Amish clothes. I think she still uses that too.

if it works well enough to use.

Somewhere there will be collectors of mechanical adding machines. If you don't want to keep it for its "cool" value, you should be able to make a handsome profit on it. It would make a nice office prop for an accountant or bookkeeper.