Last Updated: Jul 19, 2016 Views: 81
I didn't find this in our glass trademark books, but I did see something on a website about a glass mark of M inside an outline of Ohio. According to the website it is a trademark used by Mosser Glass in Cambridge Ohio, which has been in business since 1971. The website I found the reference on is: http://myinsulators.com/glass-factories/bottlemarks3.html
They have a link to Mosser's website as well. You might want to contact the company to see if they can identify your piece as being one of theirs.
We do have several of their catalogs....they make reproductions of early American glassware. Several of their catalogs list spoon holders as one of the pieces they produce. Unfortunately, none of these catalogs have been microfilmed, so we are unable to offer them to you through interlibrary loan. It might be simplest just to contact Mosser, the company, to see if it is indeed their work.