I don’t have a photo of it but the “guitar” player (the keychain looks like the photo - if it works when I try to upload). Should be one silver and one gold colour key. Have you found a set???

I feel very sorry about this. Can you share a photo of that key? 

I stupidly managed to drop my house keys somewhere between the Coop by Alderbrook school and the clapham common bandstand. The keychain has a cartoon guitarist on it and says 2010 Montreux Jazz on it (small wrirting). If anyone finds it would you please let me know? It was gifted to me the day my son was born in 2010 and means a lot to me.