They are beautiful shoes, no doubt. But if anyone actually bothers to go to Grenson's website and click on the Footmaster line (and the Masterpiece line as well, for that matter) in the left hand Shoe Browser box they will clearly see that they are, in fact, Footmaster's (the Canterbury) and not Masterpiece's. Genson's
Just my two cents.
I think you are missing the above mentioned points:" The channeled-sole, oval cutout with model #, and faint signs of burnishing on the toe lead me to this conclusion." That it appears to be the same does not mean that it is. Because they are not shown in the current Masterpiece lineup does not mean that they are not Masterpieces. That they are most likely an older model makes referencing current catalogues moot, IMO. That and sometimes individual models are manufactured exclusively for individual resellers, to their own specifications.