I have an Epi in that vintage that I was trying to find a part for and finding "real info" on Gibson Products prior to 1977 can be a challenge.
Found this link though that might be useful to you: www.guitardaterproject.org/gibson.aspx
Ran your number through it and guessed at the labeling and it came back with 70-72 manufacture date. With better info you might be able to nail it down a bit more.
My Epi also suffered some dings and is the sunburst finish in which the clear has tint in it to give the colored effects. I was able to tint some clear urethane close to color and filled in the divots with a small detail brush, which wet sanded out flush and buffed in without any noticeable problem.... getting the color right was the hardest part. Having a friend in the auto paint department of a local store was nice as he was able to provide me with tiny amounts of the tints needed to do the project at very reasonable cost. It was kind of like fixing a rock chip on a hood.
Take Care; Doug
"what is this quintessence of dust?" - Shakespeare