moini.net - Jim Moini's License Plates
UNDERTAKER From 1923 to 1925, NJ issued plates to undertakers with a "U" prefix and a 3-digit number.
For all intents and purposes, they look like courtesy plates, but courtesy plates never used "U" as a prefix.
1923-1925U100 -
These are the only known examples of this type

1924John Anshant
New Jersey Undertaker License Plate

1925Ron Hepkin
New Jersey Undertaker License Plate