Older Flex Brochure

Does anyone have the PDF of the pre 6300 Flex brochure that came out originally which discussed the dynamic range of the radio. It talks about the radio having the same dynamic range at 100 cycles as 2000 cycle signal separation. It mentions the fact that crystal filters are inferior and have ringing problems. It gave a very good description of the radio. It was an earlier pre 6300 brochure.