I found a slew of Yiddish typewriters at the Yiddish Book Center (about 15), and I'm trying to date them all. The problem is sometimes these Yiddish language typewriters used previous builds, I assume in making the custom-made reverse carriage. For example, on the first one below, the decal doesn't match other 1917 models I've found online. I could be wrong. Do you see any inconsistencies to better date these?

The two serial numbers are 
Underwood #994707 (1917?)
Underwood 46T #10886375 (1918?) [the carriage is missing]


 

Uwe, yes, the springs on either side of the alignment guides are there. They are presently holding the guides firmly against the paper. However, my guides are currently detached in the middle from their respective metal pieces that are adjusted by the I, II, 0 business. I am planning to do some unscrewing, lift up the alignment guides off the machine (attached to the metal piece that I will unscrew), and underneath I should have a clearer look at that metal arm to see if I can get it closer to the paper. I am just uncertain how it will work out. 

1) What are the features that a Super de Luxe has vs. a De Luxe SG1?

2) I think it's the plastic alignment guides that aren't allowing the paper to go under the paper bail rollers. Even when I set them to I, the closest they get to the platen is still too far away. I just detached the alignment guides from the metal arm underneath that is set by the I, II, 0. Now they are resting limply on the platen itself, and the paper works with the injector system without a problem. So I think that's the issue--I have to figure out out to get the I setting a little closer to the platen itself. I don't want to leave the alignment guides detached because I think there's a chance they'll snap off if I forget and replace the carriage on top of them one day.

Just joined the club today! Bought my 1962 SG1 with paper rest off craigslist for $40 (*bragging*).

Question--it'll have to be cleaned up, but one thing I notice is that the when I use the paper injector, the paper hits the paper bail rollers in front, rather than going underneath them. It crinkles the paper on top. Any suggestions on what I need to adjust? I could just lift up the paper bail, but that takes away from the fun of the injector system.

Is there an online list of the type foundries that make the individual type bars themselves as listed by code?

I have a Yiddish typewriter from 1930 and am curious where the Hebrew typeface would have been made. I can see was looks like P84 on every key except one. On one of the keys that does not have Hebrew characters--specifically the (! ,) key, it is A84, suggesting it was taken from another batch of Latin-based keys.