1978 Gibson Quality / Prestige / Innovation catalog, page 5 - the Les Paul Standard and short-lived Les Paul Pro Deluxe guitars.
The Les Paul Pro Deluxe was launched in 1978 (actually a handful seem to have shipped in 1977), and this was its first catalog appearance. By 1982 it was discontinued. In 1978, Gibson shipped 5947 Les Paul Standards, versus 1399 Pro Deluxes.
Recommended retail prices for these two models were as follows: Les Paul Pro Deluxe $789, Les Paul Standard $749 (US zone one pricing).