I'm using Google's translator. I am buying a used 490t pickup. The seller told me that he is sure that it is the 490t, he said it has a T (treble) on the base, and has a low DC resistance (around 8 kohms).
If I'm not mistaken, there are only two Gibson pickups with DC resistance of around 8 kohms. They are the 57 Classic (and variants) and the 490t, but these two pickups are different at the back.
In other words, I conclude that the pickup that I am going to buy is really the 490t. What do you say?
See the picture from the pickup that I will buy.