Looking only at the image in post #7 (as it's the only one I see) I can spot a herringbone selvedge on the lower plaid in the image. Guessing then that this is the piece for the month I'll state that the green is either an astounding choice and very vibrant or else has faded somewhat over time. It's such a nice green though that it seems intentional.

It looks like the piece on the top of the image is a similar tartan, but employs more than one Green, perhaps a Navy too. I wonder how these plaids are (obviously) related. MacQuarrie maybe?