I've got the shakes

[Gunner]

Another tip-off that this is a D2 grade the description of the engraving featuring birds. The auction house must of necessity use more than one person to grade this many guns. If their description is wrong as it is in this case they do not hold you to the contract. Poulins are good people. They also have an obligation to the consignor.
Look closely before you bid no one can assume your responsibility to verify for yourself.
Actually Gs described as Ds is not uncommon. I think it stems from the D on the barrel flats of most parkers having Damascus.
My notes indicate that this gun is "slightly loose." I don't remember if this is with the fore end on or off.

PS Inaccurate descriptions can be both bad or good if you are observant. Ex. One gun was described as having cut barrels but they looked righteous and are.
Erick