Hi all. I apologize for the lengthy posting, but I have yet another mystery from a typewriter I own. 

You see, I have a flat top Corona, serial number 1C 2163. Now, it has been a challenge to date it by using the TW-DB (Typewriter Database). The typewriter was supposedly a Super Speed, but according to the database, the Super Speed 1C started at 1330284 in 1937. 

What I did find was a gallery posting on the TW-DB by a person with a similar model Corona with serial number 1C 7444. He posted that, "... It's one of the first 7500 flat tops ever produced (the first year, 1935, went up to serial number 34770)." Interesting, if I accept it as truth. However, someone just recently suggested I do my homework on mysteries like this, and this is what I find.

The NOMDA (1941), which I just learned how to access shows that in 1932, there were Corona Four models that were given the prefix of 1C. (One representing that they were produced in January or February.) In 1932, they went up from serial number 1C 00665-02161. The following year, 1933, the serial numbers started again at 1C 02162.

According to the NOMDA (1941), the 1C prefix is not again used until the release of Corona Standards in 1935 starting with serial number 1C 34770, Corona Standards in 1936 starting with serial number 1C 45699, and Corona Specials in 1937 starting with serial number 1C 76123S. The Liste der Herstellungsdaten deutscher und auslandischer Schreibmaschinen (1953) also appears to support that the standards did not start using the 1C until 1935, starting with the higher number, as listed above, although it makes no mention of the lower numbers in 1932-33.

Finally, the Liste der Herstellungsdaten deutscher und auslandischer Schreibmaschinen (1962) does fully support the NOMDA (1941), showing that the Corona Model Four did produce in 1932 1C 00665 - 02161, followed in 1933 with 1C 02162 and up, for those years only.

SO... Is it safe to state, at this point that my Corona is a Model 4 from 1933? Or, does someone have another thought altogether?

Here is a picture of my this special little one. Thanks for your feed back.