Here is the serial # on the door, measurements are 29 1/2 across top plate, 28 1/4 from back to edge of ash shelf. Door opening is 21 1/4 by 10 1/2. It has the factory baffle plate. The guy gave me some of the paperwork that came with it when he purchased it along with a brand new damper knob Fisher sent him when 1 of his seized up. They sent him a pair so I have 1 brand new and 1 that is seized up for spares. (PB Blaster should take care of it.) Maybe he misspoke and I didn't even think about it when I was removing the fire bricks, but you are right, it is a Grandpa.