the date is the date of his ascension to the throne...as I said on another forum...it is the 25th anniversary as he ascended the throne on December 2 1848...he had a very long reign...68 year to be exact. There are a variety of medal types commemorating this date...I have one. This design is used as a General Campaign Medal made of silvered zinc alloy, I think there were bronze versions as well. There should be a hallmark ‘K*M’ on the edge. If you served in any of the Austro-Hungarian campaigns, you got this general medal...there are other medals for specific types services like 25 year service, some for specific battles, for merit, bravery, etc...This is like a participation medal. I would say its worth about 15-20 dollars in that rough condition. Franz Joseph Kaiser v Osterreich Konig v Bohmen etc. Apost Konig v Ungarn Franz Joseph Emperor of Austria King of Bohemia (czech) etc. Apost (Apostolic King) King of Hungary Apostolic King was an hereditary title of the King of Hungary by the way.
I am sure there is...I just recognized the date as I have a medal from the same year...I also have one that has him sitting on a throne...its more of a high relief medal...