Hi Guys,

many thanks for the replies, it's been very very informative.
I think that what I have is (sadly) a replica as it is definitely missing some of the serial numbers, there are three that i see in front of the trigger gaurd but that's about it..
I took aome pictures of it (it does appear well worn except for maybe the brass and the back piece is steel as shown)...

http://www.chantalforher.com/coltnavy.html

All the Best
Con