As I notice on re-entry.com, Ralph is mentioning a plate scratch noticed by Glenn archer that goes from POS 91 through POS 92, but on the picture it hard to tell where the scratch is. I tought it could be interesting of having a better view of that scratch to make the ID of POS 91-92 easier.
Here a very nice exemple of a POS 91 with a clean and clear close up on the scratch that start on POS 91 and finish on POS 92

We can see the doubling in POSTAGE and UR scroll

Here the Scratch

hope you enjoy,
Darth