Yes Ray, they did. See the spec page:
https://guildguitars.com/g/slotted-headstock-6-string-rs/
Never mind that they had a Sunburst mahogany version shown on the rosewood page! Typical Guild...
Here is one example:
https://reverb.com/item/129728-guild-orpheum-slotted-headstock-rosewood-orchestra-2014-natural
Also both woods existed with a sunburst top. So a total of 4 versions.
But since I have both a Rosewood and a Mahogany, but both in 12 string, I can say the mahogany is much better suited for that size of guitar! The Rosewood has way too much overtones for my taste (due to the Adi top), the mahogany tames the beast! I am a big fan of rosewood on like the F-30 size body, but somehow not on that size of the Orpheum.
I believe there were less than 10 of your specific model (Hog, Natural top) made. I know of serial numbers NR059003, NR113002, NR113003 and NR121003.
10 minutes to watch (it does not show the slotted headstocks as the video was from 2013)
Ralf