Adler Tippa in Napoli Script
There are quite a few variations on script typefaces, this one is in a less-common #77 style, also found under the "Napoli" script name.
Futuristic Styling
The Adler S is a later style of the Tippa, a lovely little ultraportable which got some of the sharp lines and added plastic parts which were so popular in the 60's and 70's. Compared to the curvier Model 1's it seems like it was aiming for that futuristic look. Unfortunately, like the earlier models the top of the shell still uses a weak joint to mount to the body of the machine, meaning that it's easy for these to get broken. If you're working on one of these, check for these screws before trying to pry off that shell!
Uncommon Script
This particular one is uncommon in that it seems to be in the Script #77 style, distinct from the much more prolific Tall Script #75, also listed as "Roma" in the RaRo catalog. By comparison, the 77 script here is listed as the "Napoli" style in that catalog. It is most notably different in that many of the uppercase characters are less stylized, with fewer descenders, making for better readability on single-line spacing and giving it a more compact look.
Judging from typeface examples posted to the Typewriter database, it appears that there are many examples in #75 script on the Model 1, however there are only #77 script slugs on the later Model S machines. Additionally, script #77 seems to be far more common than the #75 Tall / Roma script among the Model S examples. Since the Model 1 and the S were produced concurrently, I'm not certain why this distinction existed, or if it's simply a result of the small reported sample size (fewer than a half dozen script machines of either model). Either way, a lovely machine for typing.
In the photo here we can see the 77 printed on the slugs as well as the shorter E and C characters, which usually have those long tails hanging into the middle of the slug on the tall script version.
Issues
Like many machines, this one needed some work to get to a happy place. Most notable was the bending of some of the key levers and the spacebar arms. They were interfering with each other and it appears that the spacebar arms have been bent up a little bit, making for a very high-riding spacebar, though it hasn't affected the performance of the machine, just the feeling on the bar.
One of the screws in the body was missing and needed replacing, the ribbon was obviously shot, and the platen could still use some scrubbing, but overall it's a very tight and usable machine. From the exterior I had expected a poor typing experience from what looks like cheap parts, but from what I can tell the interior is every bit as good as the Model 1.
I was rather surprised to notice that it doesn't have a bichrome option, despite the characters being short enough to support it. Perhaps because it was available in the larger script which wouldn't fit on a single half?
The logo on the paper table is very distinctive, particularly with the black-on-chrome look here.
The badge is in good shape and the case has this rather interesting gator-skin texture that isn't obvious at first. The underside of the machine is the more usual cream color.