Totally fine, definitely on-topic, however there's not much chance of identifying a specific brand.
What is more useful is identifying an age of the bike - knowing that something comes from the 1970s.
My question to your question, is why do you want to know the make? What purpose will it serve? If you're trying to find parts for a bike, then the brand is ...
Ebikes have been here to stay for a while. I see them as a gateway into cycling, lowering the entry bar for effort, while raising the cost. That would lead to two broad distinctions of question:
How to Use vs How to Make
I suspect the distinction line is somewhere about building/modifying circuits. Here's a rough spectrum as I see it:
How do I ...