Flintlock pistol identification and valuation please

[robmc]

Hi Lads,

I have an English flintlock pistol which I could do with your knowledge on ID and value,

I believe it to be English as it has Birmingham proof marks and I think its a overcoat pistol?

Length is 9" , barrel length is 4 1/2" , Bore diameter .65".

There is no makers mark as far as I can see , there is some nice hand engraving (even on the screw heads).

The stock has some damage, mainly a piece missing in front of the side plate (see picture)
http://i1231.photobucket.com/albums/...130_142805.jpg
http://i1231.photobucket.com/albums/...130_142820.jpg
http://i1231.photobucket.com/albums/...130_142844.jpg
http://i1231.photobucket.com/albums/...130_142855.jpg
http://i1231.photobucket.com/albums/...130_142919.jpg
http://i1231.photobucket.com/albums/...128_215013.jpg
http://i1231.photobucket.com/albums/...4183571645.jpg
http://i1231.photobucket.com/albums/...4195564059.jpg
http://i1231.photobucket.com/albums/...4195871725.jpg
Any information and valuation on this would be great.

Thanks in advance,

Rob.