I have some serious doubts about authenticity with this object. The engraving has a modern feel to it, and moreover, the I on the top left is very weird, as I's are usually implied in
monograms.
In the place of that I, conventionally there should be an omicron (resulting in a
standard Petrou
monogram). So to me it looks like someone copied a
monogram from somewhere else, while not understanding it.
Regards
Gert