Raimey,
I put some pictures up a few years ago,,,don't have a camera now. But I'll see if I can take some pics though... via my kids...
The Britte mark Abe found was apparently hidden by the Lock springs/parts...would you be interested in seeing the gun & marks if I can get them?
Though I won't pull the locks apart to find the mark smile
There might be some interesting stamps for you on both flats
Let me know if it might be of interest mate
cheers
Franc