I don't know what kind of medal it is (don't know medals) but
it looks like it belonged to A. F. King of the Royal Air Force (WW1 / Britain?)
and the number his service record number ... (which you probably
already figured out anyways )

Is there an archives in the UK to look up this mans name? Maybe it
would mention medals awarded to him?

Don't know if any of this helps but hope so. Am sure someone else will
pop in here and give you all sorts of info though ...