If I remember correctly, Maine Antique Digest had an article on these awhile ago. I will check their archives for it.
Here is the MAD link to one article...
http://maineantiquedigest.com/articles_archive/articles/jan07/stack0107.htmThe chart at the bottom of the article has the Tyler medals at $21,850! Article says there are a lot of fakes so I would have this authenticated for that kind of money.
Here is a good article on the medals...
http://members.fortunecity.com/tokenguy/tokentales/page58.htmIt says some were struck in 1969 and reworked by individuals to look old. This section has me wondering about this one posted...
FAKE and FANTASY PEACE MEDALS
A number of fake and fantasy peace medals are known, there are a number of castings of authentic medals done in grey coloured pot metal. Also there are a number or people who rework 1969 vintage authentic medals, by drilling holes for suspension, and aging the metal, and adding suspension collars and ribbons.