I found this coat of arms on old piano notes.
What is this coat of arms?
I don't have an answer, but perhaps the following might be a clue for someone else's research.
If I'm reading the hatching correctly:
The top contains dots, which would indicate that it should be or (gold).
The bottom is hatched with horizontal lines, which indicate azure (blue).
There are three roundels (circles). My initial read is that the are all solid, but it is possible that the top two are hollow. based on what little I know of heraldry, I suspect that they are all solid and the appearance of hollow is a result of poor image quality or poor ink transfer.
Assuming that the base is azure, the roundels would need to be either or or argent
Initially I thought the roundels were "in base", but based on other evidence, i wonder if the field party per fess
The Schneller crest is quite similar. The name is the same and the colors match. But on the other hand, Schneller has 4 roundels. and appears to be party per fess.
It is possible, but unlikely that the charge in chief in OP's arms is the same as Schneller.