1912 S Barber Dime - Au? Bu?

It could be just the pictures, but I see a lot of wear on the obverse, most of the word LIBERTY is missing and there is wear on the hair and leaves. I would grade the obverse VF-25. The reverse is in better condition, though the edge is worn at the top and the stalks also have wear. I'd garde the reverse as EF-40. Based on what I see in the pictures I would grade this coin VF-35.

I don't wish to be a voice of disappointment, but I have to generally agree with the grades mentioned. Here's why:

First, the terms "weak strike" and "San Francisco" almost never appear in the same sentence. Yes, examples exist, but the San Francisco Mint has displayed an uncommon dedication to strike quality throughout its' history, across all denominations.

In your favor, though, the obverse is remarkably mushy by comparison to the reverse, lending strength to your strike argument.

Second, LIBERTY is a very high point in the design. Were this all about strike, I would suspect it to be much more "worn" before losing the details around the ear and at the hairline. On the reverse, the leaves between 4-5 o'clock and the vertical one at 9 o'clock are the highest point; I would expect them to be more washed out prior to the loss of detail we see in the corn tassels. Those tassels at 2 o'clock are particularly important, being both low in the design and exposed to early wear.

Worse yet, the pattern of toning I see in the pics is characteristic of a coin "recovering" from a chemical cleaning. Natural toning would generally form over the entire surface from the outside in, not leaving an area of relief around the lettering and design details. Particular attention goes to the area between "OF" and "AMERICA," which should be just as toned as anything between the letters.

Obviously, some of my opinion is subject to argument specifically because I'm concluding a lot from one set of photos. If it were me, though, shopping this coin on ebay, I'd call it "low VF, probably cleaned."