I'm pretty sure that's a '72. I had VIN 54345, which had the door tag missing, but I estimated it to have a build date of 11/71. It had the vertical defroster glass, which was used up until 12/71 I think, or close to that, so that's likely original glass in your car. Series 1 cars were made up to 1/71, and series 2 cars were made until whenever the '72 model year started, without looking, probably sometime around 9/71. Looking at your photos, it doesn't appear your car has the chrome gas door latch, which is dead giveaway that it's a 72 or later. It also appears to have the lip on the rad support for the weather strip piece that they added later, which is interesting, since I don't believe '72s had that.