I own a couple of pairs of Celestions (DL-8, Dittion 110), but the model number you give seems only partial. As an example, there was the Celestion DL8, then the DL8 Series 2. Both were 8" 2-ways, but the Series 2 had a slightly larger cabinet.
Look on the front baffle, that is where they [usually] placed the model number. They were exceptional loudspeakers, I am currently using the Ditton 110's as my side speakers and a single DL-8 for the rear. Unfortunately, it's mate has a blown tweeter and will need to be fixed. They are nearly identical in tonal colour to my current B&W's that I use for my front L/R speakers.