I picked up this #4iv a couple of years ago and the description said it has a "cracked plate at right." Well I've looked the stamp over quite thoroughly with a 12x magnifier and by scanning the stamp at 1200dpi and examining it on the computer and I can't make out a scratch. The only anomaly that I can make out is a small white line below the upper-right numeral 3. But, a scratch in the plate would be a recess, so it would pick up ink, which would result in a red line not a white line.
Have a look, let me know if you can make out the scratch.

Green arrow highlighting the white line.
