Australia 1979 [Risolto]

When my search did work i didn't find this coin

That is surprising.  Maybe you had on a filter for coin type other than Standard circulation coin or All?

https://en.numista.com/catalogue/index.php?e=australia_section&r=&ct=coin&im1=&im2=&tb=y&tc=y&tn=y&tt=y&tp=y&cat=y&ru=&ca=3&no=&v=5&i=&b=&ie=&u=&a=1979&dg=&m=&f=&t=&w=&mt=&g=&se=&d=&c=&wi=&sw=

Thank you!

Yes I must have done something,  it is working fine today