The product code is AKB40, which means it's an A410/1 - there is in fact some speculation as to whether the earlier A410 was ever produced, before the introduction of the "/1" enhancement to the A400 range, which involved upgraded memory- and video-controller chips.
I do already have an A410/1, which you can see here, and the interesting thing is that this one here is serial number 337, and the other one is 448, so they might have been in the factory at the same time, perhaps even made on the same day!
The previous owner has recorded some upgrade information on the bottom, which adds to what we know about the Econet interface - this must have been a Level 4 file server at some point in its history. It's about time I had a look inside.