Another interesting piece in that Steve Album auction is that debased silver piece with good gold content. RW if you look in the Mexican Numismatic Association Library under Past Journals for my XRF study on Cast 8 Reales of Chihuahua you will also see a debased Cast 8R. These two have the same overall fabric or LOOK (so to speak). I talked to Mike Dunnigan and he suggests it was simply a forgotten or hasten situation at the Mint on why some of these mostly IMO 1811-1812's not 1813's have Plain Edges. This may also be the case say for a stock of these low silver issues which look really crude than most other cast Chihuahua's. We may never know ... this is only the second one I have seen and it seems Albumn did an XRF on it just to see what was going on ... overpriced IMO or over-estimated. Remember also Luis of Aureo & Calico also has the one with two T counterstamps on either side of the bust figure. So plain edges, lower silver content/yet good gold and mintstamps & a mint stamp (T) blunder. I have not heard of a FOURTH mishap for these issues.
JPL