Rollei Magazin 77 slide tray for 6×6 windows in box 1980 Germany

From the 1980’s comes this box with slide window carrying tray for large 7×7 windows to be used with the Rollei projectors. It is an original tray in the original box with some signs of use. Tray is complete and checked for cracks. Box may have some writing but the 30 lines to fill out the slide descriptions are empty…so seldom used by the former owner. I have several to sell all in the same condition and same box ear. The box measures ca. 17,5 cm or 7 inches wide. Check the video for the real manly way to few your old slides.