Hi, Odell23 is the expert on this and I am simply going to give you a pointer to his Jan post. At the bottom of the message page is a search box. Type The DeLuxe Models and search. The capitalization is important as is the spelling. You will find a 2 page message on the various models the -DL, the B-DL and so forth. As I read Odell23's post, the 24E-DL would have been made for one year, 1965. His post was Jan 7, 2012. Invaluable. I hope this helps. Evan