NOTE: In 2008 and older reference books, there was a U-436C listed. Listing are now moved to U-436. Old U-436, U-436A and U-436B are now removed.
NOTE: In 2008 and older reference books, this was known as U-437C. The old listing for U-437B was deleted and this one moved in to its spot.
NOTE: In 2008 and older reference books, there was a U-438C listed. Listing are now part of U-438A.
NOTE: In 2008 and older reference books, there was a U-450 listed. Listing are now moved to U-441A.
NOTE: In 2008 and older reference books, there was a U-447B and U-447C listed. Listing are now part of U-448.
NOTE: In 2008 and older reference books, there was a U-452A listed. Listing are now part of U-452.
NOTE: In 2008 and older reference books, there was a U-492 listed. Listing are now part of U-493.
NOTE: In 2008 and older reference books, this was known as U-500A. Old U-500 was merged with U-501 letting Old U-500A move to the newly available U-500 slot.
NOTE: In 2008 and older reference books, there was a U-500 listed. Listing are now part of U-501.
NOTE: In 2008 and older reference books, there was a U-505 listed. Listing are now part of U-506.
NOTE: in 2008 and older reference books, there was a U-510.It is now merged with U-511 as they are just variations of the same style.
NOTE: In 2008 and older reference books. There was a U-527A listed. It is now part of the U-529 listing.