I was thinking the naming of the droids in *Star Wars* is rather unique, such as R2-D2 and C-3PO, where we have a mixture of letter and numbers and nothing else.

[![enter image description here][1]][1]

Then I thought of K9 from *Dr. Who*, which I would have to put in the same category
[![enter image description here][2]][2]

which, lo and behold, [Wikipedia](https://en.wikipedia.org/wiki/K9_(Doctor_Who)) tells me first appeared in [The Invisible Enemy](https://en.wikipedia.org/wiki/The_Invisible_Enemy_(Doctor_Who)) (1977).   

Now, of course, *A New Hope* was also released in 1977, but feature films have longer production schedules, so R2-D2 and C-3PO were probably named first.   (Is that so?)

But aside from all of that, is there an earlier reference to a robot named entirely with a mix of letter and numbers?

# What was the first purely alphanumerically named robot?

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What is not accepted:

- Acronyms ("R.O.B.O.T.")
- Names with a name or function in concert with letters or numbers ("Zeus 35B", "Toaster 23")



  [1]: https://i.sstatic.net/ryRsH.jpg
  [2]: https://i.sstatic.net/TNaGj.jpg