'67. Love it!Here are a couple photos of my SG Jr. including a back of the neck shot. I have the vibrato back on the guitar. It came with a set of the Japanese strip turners which are back on but I have a couple sets of the Kluson strip tuners that fit the original holes. My guess of it being a 66 or 67 is the combination of the pick guard, neck heel and Japanese turners, unfortunately the pot codes are soldered over. I appreciate any information, I have owned this guitar for over 25 years.
Thanks john