Sir Kill Alot wrote in Need help part 2, Character record sheets:Do printings get reset when the item's product code changes? REF2 is originally 9028 and later on it becomes 9264 with 2E.-SKA
Printing Information: Early TSR items often had distinguishing characteristics between printing "runs". Happily, these allow serious collectors to discriminate. Cover scans of the items are either aligned along the right side of the page, or displayed in rows beneath the printing information. A "Logos" button allows quick reference to the TSR Logos page, while a "Foreign Editions" button (if available) describes foreign versions of the item. The myriad numbers that TSR used on books and modules, which can further assist in determining a printing's sequence, are defined here. Also note that the vertical size of TSR modules, as well as the color of the cover, often varied slightly over time with different print runs. We've decided not to discriminate printings based on these size and color variations, unless they are significant.
I noticed that my three copies of (module) are slightly different sizes, and/or they are all slightly different shades of blue. Are these separate printings?Yes, they are, but they're not printing differences that we're tracking on The Acaeum. Over the years, TSR changed printers, or the printers would change inks/paper stocks, and the size or color of the module would change slightly. We were going crazy trying to figure out which module printing came first (and often the difference is in the eye of the beholder, especially concerning color), so in mid-2001 we decided to drop sizes and minor color differences. In summary: size and color shade of the module, for our purposes, do not constitute separate printings, unless the difference is substantial.