edc1953 - In general a car used engine electrics from one source. That is, if it had a Delco generator, it had a Delco voltage regulator, starter, distributor, and coil. The generator, starter and distributor would have tags saying they were Delco (or Autolite depending on the year). The voltage regulator would have Delco-Remy stamped on the cover and the coil would have Delco-Remy molded into the top near the terminals or stamped on the metal can.
Here is an important item: Delco voltage regulators and coils have shapes different from Autolite units. Delco and Autolite coils are functionally the same but the Delco unit is taller and skinnier. In fact, you are not going to interchange them unless you also change the mounting bracket.
Well, it would be surprising if you had the original coil on your car. You can get either type (shape/size) coil as a replacement but it probably would not have anything stamped on it. If your coil was the correct shape/size as a Delco AND it was painted black, I would have to say the judge was being overly picky.