Very interesting information. LV911 says he has the same plate with the E. I also did a search on the forum and found 3 other Vin plates for 1973 showing 911T and the E in the adjoining box, some early Porsche KG and others later like mine showing Porsche AG. Looking through the PET it shows the 73 CIS as K. Others on this forum have told me the production number on the dash is a late 1973 production number, and the compliance sticker is dated 07/73. It has the support beam in the doors and the blacked out grill. I also noticed the front bumper support bracket differs from a 1972 by having an aditional sheet metal brace welded to it. When I replaced the front corner brace it was F chassis style.