Was it the price that made you interested in it ?
There's a TON of research required to figure out ... or try to without any other pictures and information.
For instance, going through a bunch of old catalogs, such as from here
https://christmas.musetechnical.com/
You'll have to go through each individual catalog just in case it was in one and not another.
And then scour the internet, or even the library for paper copies of things, to try and find the name.
Truthfully, it is such a generic name that it is really unsearchable.
On top of that, it may be a Store brand. So you'll have to figure out what store. If you can ask and determine where and when they bought it, if they have a receipt with it and as much granular detail as possible, then you'll be in a better position to determine more about the instrument.