The document I used for the ID was "U.S. Explosive Ordnance," OP1664, May28, 1947, which states there several MODS of this projectile, but it doesn't explain the differences between them. For the ID, I relied on the measurements given in OP1664 including the band width of 1.67 inches. The band width on my shell ranges between 1.68 and 1.70 inches as it's been rolled around a bit. I believe I also weighed it when I first got it, but I didn't write that number down. Mine has a height of 17 1/8" as measured with a large caliper.
OP1664 states that this projectile was used in the 5"/50 and 5"/51 guns, both of which date from the early 1900s. The reason I acquired this shell is that it looked early and I have been trying to learn more about WWI era US projectiles.
The stampings on the drive band of mine are almost the same as the two shown in this thread. The two differences are that the beginning and ending horizontal anchors both contain the numerals 28 rather than 24 and the three letters are E.P.F. rather than W.D.C. The D within the crown is the same. My driving band also has a vertical anchor below the stampings. (I know it's time I learn to post photos.)