Hello and welcome.
These "false shekels" are a very narrow field of numismatics; they aren't "real coins", so very few people know about them and even fewer seriously collect them. All I know about them comes from reading
this American Israel Numismatic Association article.
All I can say for sure about your piece is that it is not one of the very old types; this design, with the cup given "Greek" style handles, is late 1800s at the earliest.
Get a jeweller to do a specific gravity test on it for you; that should tell whether it is solid silver or just silver-plated.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis