I see that this thread got over 150 looks -- so it's pretty clear to me that it won't be easily identified -- if ever.
While it looks like gold it could just be an electroplated charm. I don't think it is an electroplated charm.
There's no way to tell what it is worth without knowing the weight. If you can get to a coin shop it can be weighed there. You can check for the spot price of gold -- which changes minute by minute, except on Sundays.
Just to make a guess -- and I stress that I am guessing -- IF it is gold it might be a tenth of an ounce, so right now that would be $127.
Was your father a coin collector? Was this item part of a collection of things he left you?
I ask because it would let me know whether or not he thought it had a lot of value.
Back in the 40's and 50's women wore charm bracelets that often had
Encased Coins. IF one fell out in a parking lot and got dragged around for awhile, it just might look like that little gold disc you have.
It's a puzzle.