There is an extreme offset(1/16"") to the white borders. Helen Keller could read them across the room.

There are often such quality control issues with US Playing Card Co. cards. I bought a brick of normal rider backs and about half the decks in the brick, not all, just about half, had a noticeable offset in the printing / cutting process such that one side's white border was wider than the other. I just checked the 2 opened Jerry's Nuggets that I have, and the blue backed one has a slight border width difference, left vs right of only about 1/32". The red backed deck's borders were all spot on, identical in width.

A lot of cards have this accidental feature, I listened to a podcast one time about a gambler taking advantage of this misprint in Bee style playing cards, after playing with the deck for a while the gambler was able to essentially learn these misprints as a marked deck

I have always noticed Caravan decks as being cut slightly off...I once opened up a deck and the cut was so poor it ran through the pips.

I've had a couple of decks in a brick of blue bikes that has such a case of this, narrow at one edge, on every single card, that I took to using it for amazing revelations all down to the one way effect. Unfortunately one deck got damaged and the other is lost.! I continue to check every new deck though.
I first read about this in an old gambling book. Might have been sharps and flats.

I took an offset printing class years ago, and the instructor told us that the normal human eye can detect a 1/32" error in registration. When there is !/16" error you could see it across the room.
I've been reading Richard Kaufman's book "Theodore DeLand Mystery and Madness". The book tells about DeLand selling the rights for his inventions to A C Gilbert's Mysto Magic Mfg. in 1911. The extremely poor registration on the Mysto Cards led to a decline in the popularity of the DeLand Card Tricks. Gilbert was getting into the toy business with his Erector Sets at that time, so his Mysto Magic sets became mere toys for kids. Today they are toys for "Kid of All Ages".

Rich644

Dai Vernon used to slay magicians by noting small "off" details in decks of cards, or even on a single card.