Want to get better at grading U.S. coins? The Professional Coin Grading Service, aka PCGS, has a couple of handy APPS for mobile devices. In the APP Store or Google Play, search for PCGS, and you’ll find PCGS Photograde and Price Guide.
Some very good photographs of coins in all denominations as well as Colonials.
Here’s a screenshot of a portion of the Seated Half Dime page. You can also zoom in for closer view. This example is lower resolution due to file size limitations of this forum, but if you download this free APP, I think you’ll refer to it often.
Jim