The explanation for my car had to be that in 1973 the appearance group 2.0 was a different model# and base price than the stripper, and then in '74 the appearance group was an option on the 1.7, and standard on the 2.0. (But did not include the alloys, read the sticker- they would have been a separate option). In '74, the 2.0 had steel wheels standard, but instead of the crappy VW hubcap type they were the "styled steel" sporty ones that Beetle convertibles frequently had. (Remember those)?
This "separate model" jive was not so unusual as you might think, auto makers still do it w/ option packages. Porsche wrote the book on creative window stickers where they would raise the price and include less at the same time; sometimes several times during one model year as the currencies fluctuated. They were bastards.
No way on earth was my car altered, where would they have gotten the painted bumpers? They did not exist in '72, but I will admit that a non appearance group 914 was a rarity, period. Who buys a brand new Porsche that is that cheap?? It was an expensive toy no matter what, compared to an MG or an Alfa Spider. My car was like an early "T" w/o "S" options group; you know- only 3 out of 5 gauges present, steel wheels, no deco rocker trim, etc...
P.S.: In '74, a lot of cars had the "Porsche" graffics/stripe down the sides, I never liked that.