Wheel measures 18" diameter x about 15" deep with the handle. Overall dimentions with the wood beam and grinder 21.5" long x 15" deep x 19 tall. It looks like someone took the time and care to clean the gears and make sure it works. Cast iron and heavy weight 39 lbs with the antique block it is mounted on. Wheel spins both ways without issues.
I have not actually tested the grind with anything but the gears spin when the wheel turns see video. The wood beam it is mounted on does have a cut away and galvanized grain shoot is nailed in - size of the beam 5.75" wide x 21.5" long x 7 tall. This is a used item so minor signs of wear should be expected. Any additional notes specific to this item are listed above. This will be packed with care for safe travels.