Dubie,
It's green "linen"...not canvas, & it is not the brown that is around from time to time. The Randall shop uses green canvas also, but only on "CDT" models. Any 1/4" stock, full, exposed tang will be green linen if supplied from Randall.
Also: The new #28 is available in green "linen" also, even though it is 3/16" stock, therefore requiring a narrower "slot". In short: If it's this type of construction (slotted, full, exposed tang)...It's green linen.
I just got my cast off yesterday late afternoon (one month). As soon as I quit whining I'll get the camera out & post some photos.
Best, Capt. Chris