Approximate Diameter 67mm
The Obverse Half 3.5 mm thick has a threaded bolt brazened to it
The Reverse Half 5mm Thick awarded to E. Mercier & Co looks like it had a threaded bolt as well but must have snapped off when it was removed from whatever these were attached
They both appear to be Silvered Bronze
The Bordeaux Wine Exhibition was held in France
My Thoughts are they were mounted to a display at a wine tasting parlor or museum, then at some point deaccessioned
This may appeal to Someone who collects French Wine Making historical pieces.
Both half pieces are included