Apollo 13 - 3 1/4" - Cape Kennedy Medals

Cape Kennedy Medals 3 1/4" Apollo 13. Packaged with collection that included Cape Kennedy Medals 3 1/4" Apollo 9 and Apollo 7. 

I am making a leap that this version is CKM due to the unique 3 1/4" size as well as the associate with at known CKM issue Apollo 9 in the same set.