I've got that cabinet. It's one of Singers in their "Library" Series. BTW - the stool is for a different style cabinet, the one that goes with this one has legs that match.
There are four, the one the 101 comes in, this one, one that has the folding top (older one that splits in the middle) and the one the bentwood case fits into.
I'll dig through my manuals for the pictures.
Deb, I consider a "good" price to be under $35 inculding shipping. I've paid up to $125 for one of the truly rare types. Just the box - I see them sell for around $15-$25 including shipping. Lots and lots of sellers list them for much higher prices, but there are so many for sale, just wait for a bit and a reasonable one will show up.
Very, very rare you will find one with all the parts. Be careful as many times they have lots of parts- that don't belong. And they are often missing screws and stuff like that. I posted quite a bit about what to look for not that long ago, and if you search puzzle boxes on this forum, it should show up.