Here is what I found on sizes when I researched my stuffer. I kind of think my stuffer had the number painted on it but I don't remember.
#5 2 quart, 4 pounds
#25 4 quart, 8 pounds
#31 6 quart, 12 pounds. 7 1/2 inches wide inside the bowl.
#35 8 quart, 15 pounds
The #31 and #35 are the same size and take most of the same parts, the #35 has a taller bowl then the #31.
I have the #31, I guess I never measured the bowl height but I can if you need the info to determine which one you have.
Muddy dogs you say the 6 and 8 quart are 7.5 inch but your link shows 8 1/8” or did I read that wrong"
That's most likely Shapleigh hardware . Store opened in the mid 1800's ran thru early 1960's . Just FYI .View attachment 346988 Just drug mine out it’s a norvell.sharleigh hardware co. Made in St. Louis mo. Patented in 1897 always thought it was an enterprise.
If it cranked hard and spewed a bunch around the plunger your mix needed more water. Also the smaller the stuffing horn the harder it is to crank the handle.
I double p a sheet of Saran Wrap to prevent blow by around the plunger. Make sure you have the correct sized disk? One for lard and fruit is smaller to fit inside the strainer basket. My disk fits very snug all of the way down the cylinder.
Enjoy, first run looks great.