Many of us have period Mark VIIs. The previous owner of mine wrote his name, and what I believe was his regiment, but I can't make it out, and I'm not proficient enough with imaging software to bring it out.
Anyway, cheers to my Mark VIIs original soldier, Cpl. Knowles.
Mine's used. I should check the writing on it again, but I do think of it as a genuine artifact. I know it's cliche to say, but it does belong in a museum.