Lol, and I've slept since then. A lot of what I've learned I picked up from the people here. I have a lot to learn still. A great group of people here who are happy to help. Usually won't give a hard time about it like you're used to. Have fun with it. Enjoy the research it keeps ot interesting.
http://www.forumancientcoins.com/dougsmith/vf.html While I am fond of that particular book for a reason that might or might not be obvious, I do suggest shopping around. I have seen them cheaper. https://www.vcoins.com/en/stores/ep...hristianity_virtually_new/130331/Default.aspx They originally sold for $50 and did not go quickly. About 5 years ago Victor still had some for sale when we did a little talk at a show in Fredericksburg. That was where the one and only copy in existence signed by both the author and the photographer was created. For ID, it is hard to beat the free, online resources. Whether book or web, a problem is that it helps a lot if you already have an idea what the coin is and are confirming that idea rather than starting from complete 'no clue' status. The 1000th coin you ID will be a lot easier than the first.
There are many minor variations of the Sol type. They come from several mints and each mint had a few different minor details. A few are below.
Thanks Doug. My descriptive skill is not the best. I believe I was thinking he had one like your very bottom photo. And was a reverse on a Constantine.
Here is a typical Sol reverse: Rome mint, A.D. 316 RIC 49 (var.) Obv: IMP CONSTANTINVS P F AVG Rev: SOLI INV-I-CT COM D M -Sol raising right hand, holding Victory on globe in left RT in exergue; star in left field, dash in right 20 x 18 mm, 3.0 g. Note: The right field mark is usually a U, not a dash. This dash was probably an engraver's error. BTW, I have a web page with images of many of the different bronze coins of Constantine: http://feltemp.com/Constantine_1.html