Do you have a source for this? I can’t find anything confirming it.

edit: I found a spec sheet with a lot of details: https://www.elkayfiles.com/spec-sheets/spec12-59_vrchd(tl)(d-8).pdf

However, my phone, mobile browser and perhaps old eyes are not adequate to read the instances of “19” and “date” in the PDF to determine whether they agree with your claim. I’m very curious.