Thank you for viewing. This is a Showa-era retro Sansui pre-main amplifier catalog (AU-α series). It's a fairly old catalog and has been stored at home for a long time, so there are some scratches and stains. (Please check the attached photos.) ・AU-α series (907, 707, 607) October 1986 This is a very valuable catalog now. Please understand that this is a used item, and if you are interested, please consider purchasing it.