These cameras can be tricky to identify and I fin that they are even more difficult to date Ian! I believe mine is probably pre-1928, which is when Louis died and so it is unlikely cameras were stamped with his initial (but not impossible of course), but it could also be as early as 1890ish too. It shows signs of being heavily used. I have another later camera, a 5" x 4" Tailboard but which was obviously originally built to take a roll film holder, and it is most likely pre-WWII but again its difficult to know. I've not managed to find a roll film holder to fit it as yet as there were numerous slightly different holders all of which fitted into a proprietry slot depending on maker and camera.