I googled " Olivier De Serres", he was an argricutural soil scientist from France. This medallion is heavy and non magnetic. I'm thinking its copper. Its about a quarter inch thick. Just exactly who made this and where it came from, I don't know. I think my dad got it in germany in the 1950's when he was in the US Army.
found one on Ebay. Hope this helps http://cgi.ebay.com/19th-C.-AGRICUL...ItemQQimsxZ20081120?IMSfp=TL081120106005r3606
My pleasure. Thanks for posting it. My heritage is French. My father and I do a lot of genealogy work up in Upstate NY on our family history all the way back to to 1600's from France so it's nice to see a cool French piece like that. Thanks again for sharing.
The wording on the obverse "Comice Agricole de Vervins" -Aisne- translates to "Agricultural Show" in Vervins (city) - Aisne (department, equivalent to a state). Aisne is in the northeast of France and was formerly part of the Champaigne region. The medal is bronze and is for a third prize at the show. There is also a silver medal, and I suppose maybe a gold one too. I think it may be from 1850 although there have been other shows there in other years.