That sounds a fun gathering!

I'm my own spouse at the moment so I embarrass myself bringing things in the door. There's only one door. The place is so small, & much as I love them I'm getting sick of seeing typewriters everywhere I look: on the bottom shelf and on top of the book case in the living room, under the table which is my desk in the living room, piled in front of another bookcase next to the couch in the living room... under the sideboard in the bedroom, under the bed, and set up on two small tables in a corner of the (admittedly enormous, but very much multitasking) bedroom. There's even a Splendid with its carriage off sitting naked on the little shelf underneath the coffee table. Oh, and two behind the little couch, one of which is my only parts machine, the SM5. There are 33 typewriters in my living room. And miraculously it still feels pretty much like a living room, but there's just too much pressure on every bit of this flat. It's no wonder I can barely work. And there are nine in the bedroom, so I've just figured out how many I own. (And there's the Lexikon coming on Monday.) (And all this is before you get to the guinea pigs! Thank God there aren't 42 of those...)

 Much as I'd love another Progress, in other words, I must be content with my little Continental. 

+1!

The Olympia appears to be an SM-4 with green space bar and tab set keys.  I have been eyeing a green IBM Selectric II, but know nothing about those.  It seems to be in good shape and was even serviced at some point locally.

I drove about 40 miles to get a Smith Corona (actually SCM) Secretarial, standard size machine from the early 60s. Very grungy, but for $5 I figured I couldn't go wrong. Turns out the drawband was wrapped around the mainspring drum, which was why it didn't work. But after finally freeing the drawband, threading it back under the carriage, and winding up the mainspring, suddenly the spring didn't take tension. It must have come detached from the core. Game over -- that is well over my competency level.  

But the great news is that the brackets holding the feet are, as I thought they might be, exactly the same size as for my Deluxe Secretarial of a few years' older vintage, which came to me without the left side feet. (I've been using a book to support it!) So, if and when I get the mainspring fixed on the Secretarial, I can swap its feet back on it. But for now, I have a fully operative Deluxe Secretarial, which has more features (like three position ribbon switch, plus stencil) and is a darn nice standard machine.

Just when I was certain there wasn't another typewriter out there that I needed, I found one.
A really, very nice Remington Rand, Deluxe Model 5 (post 1948) caught my eye while out shopping for another hand crank wall phone.
Everything seems to work as per factory spec and the only things missing are the ribbon spools, although I do have the grey plastic spool covers.
The case is nice, even without the key.
The two tone grey body is clean and scratch free and although the innards are just a little oily, the machine is very clean under the hood.
I was happy to pay only $30. (US) for it and even more so because of the interchangeable type slugs.
I have never actually seen a machine with this feature so I'm glad to finely have an example.
One thing I don't see is a way to set the right and left margins ?
I should have a spare ribbon that will work so as to give it a type test tomorrow.