The Yale Door Closer 4400 has been around for quite a long time, and was designed to replace the older 400, which are still made. The beauty of the 4400 is that is can be mounted left or right, push, pull or top jamb, were as the 4200 you had to specify all those attributes, which made stocking them a head ache. This is a Grade 1 closer, and is extremely durable. If you are looking for a 4400BF, the barrier free version, the new 4400 is barrier free, and will do the trick. This closer has a 2-3/8" x 6-3/4" hole spacing.
On the inside of the cover your might find a sticker that says 4400/4400BF and 7500/7500BF. The 4400 and the 7500 are the same closer, but one has a Yale name on it the other has a Norton name on it.