back in the day I doubt makers such as Gibson were utilizing fancy words such as Swietenia macrophylla to denote 'mahogany' but then who knows; maybe they were? I don't believe for a minute the average person interested in purchasing a Gibson guitar back in the day was even aware of any 'scientific' name for lumbers utilized in a Gibson guitar. I can imagine Gibson likely used a generic term like Mahogany.
Same goes for any other lumber Gibson used back in the day; maple, rosewood, ebony, etc.
from a bit of reading it seems that Khaya is similar, in that it seems to be a generic term for several species.
"There are several species of Khaya. The most acceptable as a substitute is K. invorensis. This species makes up most of the African mahogany on the international market. While this is the most desirable species it maybe sold in a mixture with other Khaya species including K. anthotheca , K. grandifoliola , and K. senegalensis. Origin of lumber can sometimes help identify specific Khaya species. This may be valuable information since differences in some properties can be significant. Supplies of African Mahogany lumber are abundant, and it can be found in a wide range of sizes at moderate prices. It is also available in veneer and plywood from many lumber suppliers. African mahogany is frequently used to replace South American mahogany because it is cheaper, easier to obtain, more abundant and can be used for the same applications."
At the end of the day I don't even have much 'faith' that my 2000 Tokai LS-320 & my Momose MLS-STD/J are made with Swietenia macrophylla aka Honduran mahogany but they were marketed as such within the respective company literature, at the time they were sold.
Is it true? Beats the Hell outta me bro.
Wood is wood. :lol: