Picked this up on CL for free. It's a 10" Fender Speaker. There are no numbers or markings on it anywhere (maybe got rubbed off?). There is a number on the actual cone though.

Came out of a warehouse and the guy has no history on it. Figure it's a long shot but here are a couple pics.
A couple of guys over on the Gear Page seem to think this is mid 60s Oxford, based on the shape of the frame. FYI.
there should be a source code on the outer rim of the frame
http://home.provide.net/~cfh/pots.html (http://home.provide.net/~cfh/pots.html)
It was worn off . Can't even tell where it was.
It looks a little but like the old Oxford speakers. It doesn't look anything like the Jensons or CTS speakers I've got in my old Fenders.
It could also be a Utah. I would do a google image search for Oxford and Utah speakers and see if it leads you down the correct path.
I did a quick search on my lunch break and the holes in the frame were shaped the same as a '67 oxford I found. I picked up a VHT Special 6 on my lunch break for $80. Great condition. Supposed to be good for modding. I'll put this speaker in there as soon as I get a chance.