The Polaroid Land Film Holder #545 is a film holder for 4x5" large format view cameras. It can be used like a common film holder, clamped between matte screen frame and camera, but it is much heavier. That's because it's used with Polaroid's special 4x5 enveloped instant film sheets. The film holder doesn't take the common Polaroid film packs. It's just usable with single sheets of that special enveloped instant film which was available until ca. 2005 . Ca. 12 different variants of that film were made, with film speeds from ASA 50 to ASA 3000 for black and white positives on paper, and in a smaller speed range for color positives on paper, and one version for making black and white negative and positive at once (the negative needing an extra fixing bath).
This is a USED back, there is wear on the edges and the back shows signs of age and use.
This unit has some scratches and scuffs but appears to me to function like it is supposed to. Everything that is included is shown in the pictures.