I have 3 examples of that chip and an industrial grade UV light. Turns out that 2 of my chips show the white elements as pinkish and the 3rd one is brite white. This means the chemical mixture was different between between the 2 and the 3rd example.

However, in looking at the 2 that show pinkish under the UV light, one is a thick line and the other is thin line. This "could" suggest that more than one injection mold die was in use at the same time. Which stands to reason, as how can you make tens of thousands of chips with only one mold?

And if that is the case, then my first post is somewhat invalidated, as my examples indicate the same formula for two different mold versions.

Jim