Frankfurt coronation of Francis I [solved]

Here is a coin I am having a little difficulty with verification.

Hoping someone can point me in the correct direction as I seem unable to locate it numista and have only found a couple of references on the net.

more of a medal than a coin. https://www.acsearch.info/search.html?term=1745+kr%C3%B6nung+frankfurt&category=1-2&en=1&de=1&fr=1&it=1&es=1&ot=1&images=1&thesaurus=1&order=0&currency=usd&company=
Important is the exact weight and diameter as they where made in many different sizes and weights.

I am weighing it at 2.1g with a diameter of 21mm +/-. From what I have found and the link you sent, it seems to match up with what is variously ID'd as "pattern 3/4 ducat" or "commemorative medal". It seems to make more sense as a version of the commemorative medal for the event. Thank you for the link.