Some great phones here Thomas but surely they can't all be 8000m's as they have an extra key. I would say that if they have a NAME/MENU key then they are a derivative of the 8500X. If they have small LED and LOCK then 8000X and large LED and LOCK then in the UK it would be a Independent, in the US maybe a 8500XL?
Wow, some great info there, that's very useful. Just checked my collection which contains all the UK models and all i can really add is I have F09YVD on my 8800X LED, 8800X LCD and the 8900x-2. The rest all match up.
One of my 8500X's has F09ABC0000AB which is odd. I normally find the older models were made in the US and then when they slimmed down they are made in the UK. All my other 8500X's are made in the US so perhaps this was an earlier prototype when they started manufacturing in the UK. The serial number is odd too, it's 745GABC123 I've put a photo up on the 8500X page.