In a lot of ways, the Atom is in very good condition. The case is intact. It is just the missing keys which let the overall appearance down.

There are four missing keys, "3", "BREAK", "[" and "LOCK". Two of them are simply missing keytops. The other two have broken keyswitches as well.

I would say it is about two-thirds of the size of the BBC Model B but it looks very similar.