This what I have heard, but not from a judging standard; the 54 had no chrome, the 55 had U shaped one piece Chrome, the 56 I think is tr3, but maybe the early ones are tr2, and I am not sure what they had maybe either or, but Randal’s car is a 1956; he will know--- and then in 57 they had the full 2 piece ring. I have also heard the 55 U shaped piece is difficult to find. One other thing, I guess the year of the car sometimes depends on when it was registered in the USA, so the vin would probably be the safest, but you have a long door, so they should be consistent, maybe.
steve