Congratulations George and welcome to TNet. I have to agree with Iron Patch although I have no solid evidence to say it, but with that lettering so crooked and the date being all over the place, among some other obvious differences, I have to say it sure looks like a counterfeit, which makes it more of a collectible I would think than a standard Half Real.
Since it looks like silver, I assume it is solid silver, so if you get a chance weigh the coin. It should be in that condition about 1.6 grams minimum, if lighter than most likely a counterfeit.
I have one from the early 1800's that is without a doubt counterfeit, since the silver is peeling on the edges (plated) on the coin over a base metal.

Either way a nice coin, and would look good in any collection.
As Romeo stated the term Reale does not start until you have a 2 Reale. (Half Real, One Real, Two Reale, Four Reale, Eight Reale.)
Don