Gray,
Thanks I do agree and actually believed it to originally a #29 1/2, I used 103 as that was very similar and brought up by others. It was not modified by an average smith but of the professional abilities at G&H. The entire application would take some careful fore thought and engineering.
I have not seen any reason to believe it is not a G&H rifle and now I must consider whether it should be restored to its original condition. I will contact G&H and begin discussions on such a project. I would only replace the barrel and the G&H side scope mount.
If anyone has pictures of a singleshot G&H rifle with their side mount I would love to see them.