re: Confederate Veterans slogan
Stallzers example with the year at the bottom of the dial and the rectangular slogan box comes from an International Postal Supply Company machine. (Luff 5895, "4 - 8" in bottom line)
jleb1979's example with the year date as a central slug in the dial and the wavy slogan box comes from a Universal Stamping Machine Company machine. (Luff 5895A, "4 to 8" in bottom line.)
Here they are together on one of my favorite covers from the teens, fed mis-faced through the International machine at 7:30pm and then correctly through the Universal machine at 8:00pm
Luff's "United States Postal Slogan Cancel Catalog", 1975, indeed notes four different slogan box typesettings (done by hand) differing by very minor shifts in the positioning of the letters. Here is Stallzer's and mine with red ovals drawn around the I, E, and V spanning three lines, to show one such difference. Note how the alignment between lines shifts. The other two killers show different alignments also.
Luff lists an extra International variety with the text matching the Universal text "to" in the last line, which is apparently in error as a more detailed c2000 listing of slogans by the Machine Cancel Society does not list this International variety.