help me read the date on this Ludovic XVI sol

I believe it is one of these https://en.numista.com/catalogue/pieces5466.html


Please don't be date illegible. mint mark suggestive of ..? what privy mark is that?

it seems to me like mint mark: &.
Mint: Aix-en-Provence.
KM # 578.17
1778-1786
but the engraver's mark is like "cockerel" ... Engraver: C-R. Röettiers ???

very bad condition of the coin ... I would not waste my efforts to determine such ...

I only can see a shadow of that date but my guess would be 1780

I see what looks like 80, but the numeral should be larger. I say it looks like 86 BB Strasbourg just a few years off from this one:
https://en.ucoin.net/coin/france-1-sol-1791/?cid=92265&vid=27093

for mintmark BB, the left vertical should be straight, but on this coin it is concave inward ... is that wear?

thanks friends for your interest. I accept it is too far gone.

Do the privy marks below the bust correspond the mint marks below the shield?
i.e., the heart mark on obverse == BB for Strasburg on reverse?