Yeah it's confusing but I got 3 SD rolls out of 4 I just received today for a grand total of 3 bucks for all 4 rolls and had a grand total of 9 coins that werent rpms and 7 different rpms so I'm curious as I have went through quite a few rolls of both LD and SD and I will be going through a bunch more but I'm curious if I do get lucky which roll will it jump out at me in lol.
I would expect to find it in a large date roll. The date looks like a large date with the hint of the small date on top of it. Quite frankly it is more readily spotted by finding the D RPM which is also on this doubled die.
I have never pulled any from Unc rolls but this die must have been hubbed during a time of transition between the two types when both large and small date hubs were in use. Thus , there is a good chance both large and small date working dies were in use around the large over small die and it's probably luck of the draw what kind of roll it's in.