Mel 3x2 air cleaner???

Hello all,
My name is Ken Lechene and deal mostly in FE tri-power set ups and have a web site called HP Trends. Recently I acquired a MEL 3x2 air cleaner for a 3x2 but it has a plain top, no Super Marauder script across the front or 400 H.P. across the back. Can anyone tell me the application it's used in or value compared to the set up with the script on it? Here's a pic of it.

Thanks in advance
HP Trends