Sorry, I only know about vintage SIMANCO domestic attachments. This looks like a light industrial, and this style is in current production. So there should be info on it available.
There are some really neat specialized feet available, and some have not significantly changed from what was available 50 years ago.
The vintage SIMANCO tube foot #35984, is very different looking, and the full set comes with two long tools that work with it (one is a tube turner, not sure what the other is). The set is #35985