There is a quick way to narrow down the Overton variety, which I use when trying to attribute Bust halves. As Sandon said above, the letters, numerals, and devices were punched separately into the working die, and each die has slightly different placement of these elements. That allows us to compare the relationship between elements and identify each die that was used, and which obverse die was paired with which reverse die. Check the alignment on the reverse of your coin of the "T" in "UNITED" with the "I" in "PLURIBUS." You will notice (if I am reading your picture correctly) that the left side of the vertical post of the two letters lines up almost exactly. If you compare the pictures of the varieties on the Variety Plus page - luckily, this year has only 10 die pairs - you will find that two varieties, O-110, and O-103, match this description. Moving to the left end of the ribbon, we see that the end of the ribbon on your coin lines up with the left side of the post of the "D." Since the ribbon on O-110 extends past that point, that leaves O-103 as the answer to your question.
It isn't always this easy, since reverse dies were sometimes paired with multiple obverse dies, and vice versa. In these cases, you can use "star tip-to-denticle" relationships and other indicators, such as those noted above, to narrow down your choices. In the case of O-103, we know from studying the dies that obverse die 3 was paired with reverse die B, and this die marriage was the only use of either of these dies this year.
Looking forward to seeing what else you have to post.