May be, but the reason for this statement was about the wrap color. Those shells that Mr. Ludwig refers to were complete shells, wrapped and ready. The Psych colors were not made in the early 60s, so a shell of that color likely would not have had a stamp from 64, that is the point being made sir. Typically, you would see colors like blue sparkle, red sparkle, silver sparkle all stacked on the shelves. Since those shells were made by the millions, those would have been stacked high and by the thousands. Colors like the psychs and mods were not produced until later in the 60s, therefore would not fall into this category of drums, in this time period. They would have been stacked and ready, only later, when the colors became available. That is the point these members are making.
BTW, would you please post pix of your drums? And the seam on the 64 shell especially?