Why having two Ihagee 9x12 plate cameras made a year apart in the 20's together in one image? Because one (left) is a family heritage, but the other (right) was bought online recently.
In fact, both cameras are practically identical to one another. Apart from the minimal material differences, there is one more substantial change for me. The Ihagee Patent Duplex to the left was my grandfather's camera, but it's not owned by me, but by my older sister. Instead, this "clone" is really mine, found and bought online. And I say clone because not only it is a Ihagee Patent Duplex 720 in 9x12cm size as that of my grandfather, but it has the same shutter and the same lens. Finding one with identical shutter was easy, this is the ubiquitous dial-set Compur, but the lens was much more a lucky strike.
So now I will be able to take pictures as if taken with the camera of my grandfather, and with some advantages: I must not suffer so much in using it since there is no family bond (and so less responsibility if sometheing brokes), and above all it is in even better shape. In fact, it looks and feels almost as manufactured a few years ago, not in the 20's.
As I said, the material differences are minimal, a slight change in the shape of the bubble level associated with the "brilliant" viewfinder, and especially an external viewer on the side of the camera. If that of my grandfather seems to be manufactured in 1926-27, this one, by serial number, was made slightly earlier, in 1925. The shutter is a dial-set Compur and the lens is a Meyer Görlitz Doppel-Anastigmat Veraplan f4.5 / 135mm. The difference in the serial number between this one and that of my grandfather is 1200 lenses (and for theshutters, about 35,000).
My grandfather's Ihagee is the one to the left (not mine now, but my sister's), and MY Ihagee is the one to the right, with the collapsible viewfinder.