Gibson solid body 1975 solid body catalog. Page 6. Left hand page of a double page spread on the L6-S Custom. This was not the first catalog appearance of the L6-S (see the 1973 'Look ahead to Gibson' brochure which shows an early, pre-production version); but it is the first time a regular production model was shown. At this point this was the only model in the L6-S series (officially launched at any rate). This catalogue, despite being dated 1975 was actually prepared/printed in late 1974; the Custom designation was not applied until later in 1975 when the L6-S Deluxe was a regular part of the range. The Deluxe was first listed in the January 1975 Gibson price list, but didn't make a US catalog itself until the Quality/Prestige/Innovation catalog of 1978.
The January 1st 1975 Gibson price list gives the L6-S a price of $499, with the L6-S deluxe at $359-$409 depending on finish.
Need the value of your guitar? The Official Vintage Guitar Magazine Price Guide 2023 is out now