One dollar bills from the series 1988A, 1993 & 1995 that are runs on continuous rolls of currency paper as opposed to sheet printing. There are two markers that I'm aware of that are indicators of a web note. On the lower right obverse there is a small single digit # along with a small # on the upper right reverse. I've got a picture of some of mine, somewhere. When I find them I'll post the obverse and reverse for you.
No plate numbers, since they were printed on rollers. The inking has a lot of deviation, along with ink smears.
What if I have a dollar bill that is from the 1988 A series but it doesn’t have the plate number above the E on the back?