No. 6 Folding Kodak Improved (1893)

This camera is the largest roll film camera for normal photography ever produced, with a picture size of 6,5 x 8,5 inch (16,3 x 21,3 cm). It was introduced in 1893 and discontinued in 1895. It is believed that only 150 were made, and it is indeed hard to find today.
The original price was a round $ 100. For this the photographer got a camera that was loaded with a 24 exposure rollfilm in an Eastman-Walker rollholder (but the camera is able to take a 48 exposure roll). The rollholder can be replaced with plateholders and ground glass. The backpanel is a door that can be opened, which permits focussing on the ground glass. The top can be opened to get to the rollfilmholder or plateholders, and also to the double swing back.
The lens panel has rising and sliding movement and can be exchanged for a stereo lens panel. The front part of the baseboard is hinged, so that it can be dropped if a wide angle lens is used.
It will be clear from this description that the No. 6 Folding Kodak Improved was no camera for the snapshooter. It was intended for use by professionals or serious amateurs.
The No. 6 has two close relatives: the No. 4 Folding Kodak and No. 5 Folding Kodak. Both were also produced in Improved models. All the No. 6 models are Improved, there's no No. 6 that is not Improved.