Cadet Forces medal
I didn't see this mentioned in the earlier posts - excuse me if I tell you something you already know
The CFM was awarded to RAFVR(T) officers and NCO's for a given length of service. I think it used to be 12 years, with a clasp after a further 8.
Someone must have over stocked on them, as the service length requirements were reduced to 8 and 6 about five years ago. The recipient's name is inscribed on the rim of the medal given as the initial award. The clasp isn't inscribed at all.
Hope this helps
Cheers
Bob