The meaning of the script of Augsburg Confession Ducat

I recently got this coin and I want to know the meaning of the legend in Reverse

And I also want to know the value of this coin.

a first reply:

In my opinion it is a medal, at best a silver strike of a dukat.

Commemorating 200 years of “Augsburger Konfession”.

The year is specified with large letters at the obverse: LIMVIVVDCIVIVIL, sorting and adding up we get 1730.

having searched:

It belongs to ducat 1730, numista nr 31036.

I'm reading the latin text like this:

Laeta et prima urbis augustae de confessione sua jubila.

Then a translation should be possible.

 What is going on - this is the third topic for the same coin? 

https://en.numista.com/forum/topic144672.html 

https://en.numista.com/forum/topic144695.html 

I agree, meanwhile i saw the earlier topic and almost all was already said.

this type is part of WAG auction 151, which will finish at 16.06.