I bought a 401g (German made) a few months ago. Apparently it's a fantastic machine that can do everything. It's called "slant-o-matic" and I say apparently, because I don't use it. Well, I love sewing on the 320k so why change? The 401 was just there because I was told I had to have one, and it appeared.
So, now that it was sitting on the shed for months, I see a 401a (American version). This model is probably not as good and it said "doesn't work" on the ad. Well, how couldn't I have a go? I picked it up and had it fixed in no time. Can't even recall what the problem was, but was probably lint. SO which one to keep... You'd think the German version. It is truly more handsome and almost certainly better engineered and built. That's not just because of the German thing, but they were made later, in the 1960s. The American one stays, because it had a full set of accessories and the original manual. It was a one owner machine and apparently I value that sort of thing more!
Here is the 401g:
Very similar but it doesn't have that rocketeer thing happening at the top. Well, the differences when a machine is this good are stupid. It's like choosing whether to live in a mansion in Paris or a mansion in Switzerland: They're both such unbelievably good options that it doesn't matter!
The 401 has a vertical bobbin, so you can also do embroidery with it. As a bonus, this machine was designed so you can fit not just a needle into its needlebar, but two needles! Yes, two needles can go in, meaning you don't have to buy twin needles for special patterns.