Ceylon Coin: Confusing Date [opgelost]

I have a 10 cents Ceylon coin KM# 130.  The date clearly says 1978, but Numista and the book I am using both do not have this date.

The only dates I found for this coin included:
1963
1965
1969
1971

Any thoughts on what I have.

Do you have a pic?  I have a feeling it's a fake because Ceylon was renamed Sri Lanka by 1978

https://en.numista.com/catalogue/pieces896.html

Neilithic,

Thank you for the help.  It was a Sri Lanka coin.  I can't believe I actually missed that.

Coins33

 Sometimes it's the simplest solutions

http://coins.lakdiva.org/srilanka/srilanka_10c_al.html

It's not ceylon. It should be Sri Lanka