Is this the SX-150?  I have a big thread about mine somewhere in maintenance and repairs.  I call her Battleship Bertha. Apologies if this isn't the same machine.  Will you post a pic?

Aaaaah!  You caught me.  I may be a typewriter know-it-all to an irritating degree, but computers are something I'm still new at.  When I do find out what you have to have and how to post pictures, I will surely post some of my "family" portraits.  I love sharing what I know and what I've learned, but I would also like to share pictures at least some of the typewriters I still have.  To answer your question , yes, it is an SX-150.  They made these from 1953 to 1957.  Yours is practically the same machine as mine, with a few refinements.  In fact, I have a late '56 which would be mechanically identical to yours (I had a '57 model once, but I gave it to a friend years ago).  I tried to find your machine in the indices, but I was unable to find it.  What was its ailment?  As for a name, I haven't decided yet, but it would have to be similar to the one you gave yours, because, let's face it, these machines are quite heavily armored and long lived.  The Underwood SX-150 is in my opinion one of Underwood's best typewriters.  We're lucky to each be in possession of at least one. 

I think I do remember seeing that post, now that I think of it.  But I had to read it again to get more details.  What you have is a very early "Golden Touch" Underwood.  They made quite a few refinements in these.  The shifting is slightly different.  The ribbon mechanism is driven by, get this, the escapement wheel!!  This is the only make of typewriter I have seen this.  But it's been quite successful--the Underwood Touchmasteer series typewriters used it very well, along with the newer shifting mechanism.  Outside of that, they are nearly identical typewriters to the SX-150.  As for the rust, I have found that diet cola works pretty well (It has carbolic acid in it, so when you get a bit of rust out, rinse it off and dry it--especially in that area in the back where it looks like rust is caked.  I remember a 1956 Underwood that belonged to a friend of mine--I loved using it when I was a kid--it was my very first working Underwood typewriter.  That was 1981.  Fast forward to 2003, when I saw it again.  It was TEN TIMES RUSTIER than yours.  I must have spent at least six days and nights tearing it nearly down to the frame and replacing many of the parts with ones I was snatching out of a very early 1959 Underwood Golden Touch that was identical to yours.  I MEAN almost half a typewriter went into that '56 model--type bars, type bar segment slots, front and rear carriage rails, all the rollers, front and back, tab stop rack, tabulator clear and set module, spring drum, spring drum drawband, paper bail and rollers, ribbon dust covers, and other parts I can't remember.  When I got through, I had a foundry masterpiece.  I only charged my friend $25.00 for the whole thing, which was about how much I paid for the spare typewriter I melded in with his.  a few years later, he was concerned that when he died, no one would want his typewriter, so he gave it back to me.  I told him I would keep it and take care of it for him, which I did.  And then last October, he passed away.  I felt as though a torch had been passed.  I'm still keeping it for him and taking care of it.   

I decided to start posting mine over in the Typewriter Database.  I can link to them from there.

Spazmelda wrote:

I'm pretty sure my typewriter is an SX-150.  I was under the impression that 'Golden Touch' was a feature rather than a model. 

You are correct. You can use the Golden Touch name to refer to an era that the model was produced during, but it's not a model in itself. Many different Underwood models featured the Golden Touch marketing appliqué.