I dug through all of my handles and found that the backs of the handles were no way to identify whether they were service replacements or not as the recessed cavity was different on just about all of them in some way or another. Here are some pictures showing differences in the 68-69 #9715291 (frt & rr 68, frt 69)handle, and the #9717838 rear handle for 1969 Camaros. There is one picture showing the original handles along with a repro handle that either came from the "HELP" rack at the parts store, not really sure where it came from, just marked CP on the rear. I did not get measurements showing the amount of offset for each as I am pressed for time today. I will be back on here Monday, earlier if I find the time............RatPack......................