Hi - A couple of months ago I purchased my first Gandolfi, a 5x4 Traditional.

I wonder if anyone here could tell me the cameras approximate age - where is the serial number, if there is one, (I can't find it) and what is the purpose of the small screw threaded brass fitting on the front top left of the camera.

Any other information would also be very welcome

some more pictures are here:
http://www.londontramways.net/temp/gandolfi.html

Thank you in advance

nn