I find it difficult to believe Kodak would print paper for Tri-X differently from the others, but at any rate, here's a before and after from my recent experience:
View attachment 164738
I can think of two other possibilities -- 1) maybe they just ditched printing on a batch or two as a quick fix (admittedly scary) or 2) perhaps the OP's camera uses one of the non-centered number rows that has disappeared? I have no idea what cameras used those alternatives, my impression is they may be ancient. The new stuff works in my Perkeo II and Ercona II.
And yes, besides folders there are box cameras -- Brownie Hawkeyes are all over everywhere.