Can anyone help to identify this

Posted: Mon Apr 27, 2009 1:23 pm     Post subject: Can anyone help to identify this

Hello,
Very new to clocks and have come across this thing, cast iron construction wieghs 1 pound and has traces of original gilding, 5 inches tall x 2 3/4 inches in dia, stamped A R which I think is advance - retard the chain is 31 inches tall, I have uploaded some photos at this address
http://picasaweb.google.com/3suttonhouse/April2009A#, I feel it it part of a Fusee drive, the chain is on a very strong spring with a shaped clip at the other end, any help greatly appreciated.
John