Tried to save/use all my original glass panes, but they each had their share of scratches and such. Obviously, the rear window I have kept and will reuse. The glass I purchased from ECS and we went into detail on the version of the logo, the date codes and if the stenciling was done on the inside or outside of the glass. There doesn't seem to be a pattern in that regard, so we went over every one of the glass sections and noted the information, even the windshield.