THIS IS A PHOTOFACT FOR FISHER MODELS 50-C & 50-CH  PRE-AMPLIFIER.  IT CONTAINS SCHEMATIC(S), INTERNAL VIEW(S), PARTS LIST AND DESCRIPTIONS. IT IS A ORIGINAL AND NOT A COPY. THIS IS WHAT YOU WILL NEED IF YOU EVER NEED TO MAKE REPAIRS.  IT IS IN VERY GOOD CONDITION. BUYER PAYS S.H.