I have one that might up for possible sale here, later. It is a OO 12 with 60% of the case colors on the lock plates, 30% on the frame, and some of this "mild corrosion" caused by human sweat in contact over the metal I guess. DT, EXTY- 30" Armor steel barrels F&F (factory std.) splinter and POW grip uncapped- 95% original wood finish and checkering, NO cracks anywhere in either the buttstock or splinter forearm- original black Bakelite BP with original screws un-molested, 14" LOP with good straight stock dims.
I also have a grade 2 12 of that same era, and the locks and receiver are a patina and the engraving is faint but visible, and some of this mild corrosion is also visible. The Grade 2 will NOT be for sale however, but along the line of data- the grade 2 has the 2 piece top tang and the 3-position safety latch- The OO has the 2 pc. top tang, but the regular 2 position safety, which I prefer in a field hunting gun.
Both of these older pre-1913 Smiths have the std. push rod extractor designs, as opposed to the first series extractor design with the rotary joint check (has the disc and pin set into the barrel lug, and the receiver flat or water table will have the two milled out slots in line to accept this design.
I will be Up North from Friday through Mon-deer hunting in MI- but if you wish to see fotos of the OO grade in detail, please let me know and I will send them to your e-mail after I return. RWTF--