1978 Gibson Quality / Prestige / Innovation catalog. Page 7. Details of the Gibson Les Paul Special Double Cutaway and The "Paul". Despite first being shown in this 1978 Gibson catalog, these guitars may not have been available until early 1979. The Paul, for example, was not listed in price lists until January 1979, and although the Les Paul Special Double Cutaway was listed in May 1978 at $619 (the same price as the Les Paul 55, see the previous page) it is not explicitly mentioned in the (admittedly often inaccurate) shipping figures until 1979.
United States (zone 1) prices for January 1979 were as follows: The Paul, $529; Les Paul Special Double Cutaway, $659.