China - Kweichow 'Auto Dollar' - FAKE

I believe this scarce and desirable issue looks good but I must assume it is a dangerous (convincing) COUNTERFEIT! Celebrates the completion of the Guizhou Province Highway and purports to show the governors car. Chinese denomination 'One Yuan'. '.072 tael of the Treasury scale'. Grass leaves symbolize secret marks of "Xicheng" (?) Reeding is nearly perfect and, unusual for a counterfeit, it weighs ~ 1 gm too much! It also has some evidence of filing on the rim (to remove the telltale double rim?). On the 'Auto' side, at ~ 10 o'clock,& around and below the character is an area of roughness that I think is another sign of a fake coin. I'm looking for comments on this one. You can request a close-up of this coin for further study.