I'm looking for a Sony Turntable that matches my HST-231 system. It was manufactured in 1993 according to the Owners Manual. I have found the PS-LX56 which looking at the service manual I think was manufactured in 1993 but my system has a flat front and this turntable has a curved front. Is this the only turntable Sony manufactured in 1993? Does anyone know how I can find out? Thanks.