I think the silver content and weight will check out as good? From what I can gather, this particular coin is rather like the Maria Theresa thaler which is still minted - not for any fraudulent reason, but because it's both a very desirable coin in its own right, but also because it's still used in some places!
I can't see anything wrong with it, but some of the recent repros are very difficult to spot. If you have had it more than 30 years, I would think you are safe.
Check the weight against Numista. Check the silver content with the sliding magnet test, or better still if you have a jewel nearby that has the Xray gun thingamajig.