Zeiss contarex instructions manual interchangeable back. Available to purchase for immediate download. Below is an extract from the manual converted to text for a quick impression on the content. Zeiss contarex instructions manual interchangeable back1 Ledges to hold dark slide when not in use 2 Film indicators 3 Catch for dark slide 4 Cassette chamber with shell 5 Lower film guide 6 Upper film guide 7 Film pressure plate 8 Take-up spool9 Retaining spring of cassette chamber shell 10 Dark slide 1] Flange of lake-up spool 12 Take-up spool cover 13 Baseboard locking key 14 Frame counter I5 Baseboard locking key