The heat let up a few degrees from 100 to 98 so i decided to make a few more passes through my field. No 1800s today but pulled 2 wheats and one of them is a goodie. First is a 1920. The other I could make out 191 pretty easy with the naked eye. Under a jewelers loupe I can make out a really faint 4 and under the date a really faint D mint mark. I looked them up in the red book and the 1914D is a key worth over 200.00 in even horrible condition and alot more as you go up the grading scale. The rest of the coin is in pretty decent shape, the reverse is all clear and you can see lincoln on the front. Just cant make out the 4 and the motto at the top. I ruined a 1909 I found the other night trying to see if it was a VDB or not so does anyone know or ever used a professional company that cleans/restores coins? And what does a restoration cost?