What is the shell construction? Are they thin, or a thicker looking shell? If they are really thin, almost looking like single ply, it would typically indicate 67 or earlier, like early 67 and before. If they are the thicker, 6 ply shells, they are 67 or later. That is the only real test of time we have. It seems for Star that the switch to the 6 ply, heavier shells came late spring of 67. Anything 3 ply is before that time. And in my opinion, these are the better, more desirably shells. I really like these 3 ply drums, they have a deep, resounding resonance that no other drums have.
And when they are tweaked a bit, by sanding the interiors to a 220 grit and then a coat of either tung oil or lacquer, per Rogers of the early 60s. The reason I like the lacquer is simply this: If Rogers thought it was the perfect treatment for the interior of the wood Dynasonic, it has to have a great quality, as that is aguably one of the most highly collectibly drums on this rock.