They look more 'cane like' in person than in the photo. Now that I examine them again I can't say with 100% certainty. I'm the second owner and always assumed they were cane grills. Would documents that came with the speakers have that info? Mine are in my attic at the moment.
This post lists grill options (pasted below for conveninece):
KLIPSCH GRILLS & CLOTH CODES:
#03 = Cane
#13 = Heritage brown
#15 = White/black coarse weave
#17 = Duracrest, black, poly-olefin, stranded, coarse weave (Heritage only)
#18 = Duracrest, brown, poly-olefin, stranded, coarse weave (Heritage only)
#19 = Duracrest #19, black, poly/ nylon, flat weave (Forte, Chorus, etc.)
Maybe mine are 'Heritage Brown'? They definitely aren't polyolefin. Is there a photo repository of available heritage Klipsch grill options? A quick search led me to some beautiful restorations but isn't helping me find the answer. I don't want to hijack the thread but would be greatful if someone could confirm.