First post...need some help with a German coin

Hey guys,

I have come into possession of a number of coins purchased from a casual collector. Some are foreign and quite old. Most I can info on however there is one I can't turn anything much up on.

The coin in question is a 1788 1 Thaler. I can't seem to find much info at all.Thanks in advance.n'

Welcome to the site.
https://en.numista.com/catalogue/pieces31070.html

German States (Brunswick-Wolfenbuttel) 1787-1796
http://www.ngccoin.com/price-guide/world/german-states-brunswick-wolfenbuttel-thaler-km-1030-1787-1801-cuid-78236-duid-215236

Welcome here!
Very nice thaler.
'Eine feine mark conventions' was a regulations on the silver content in coins.
CAROLVS GVILhelmus FERDinandus Dei Gratia DVX BRVNSVigo ET LVNENBVRGENSIS
Charles William Ferdinand by Gods grace, duke of Braunsweig and Luneburg
https://en.wikipedia.org/wiki/Electorate_of_Brunswick-L%C3%BCneburg
https://en.wikipedia.org/wiki/Charles_William_Ferdinand,_Duke_of_Brunswick-Wolfenb%C3%BCttel
mintmark : MC : Münz Commission, Brunswick mint

Very nice ! When I first saw it I thought it was gunna be the regency issue from the early 1800's which is something I would love !

Still a a cool coin !