Thanks for looking.
I have recently seen a number of vintage watches with t-swiss-t dials that are not obviously re-done, but have tritium plots/markers that are green in hue. Is this normal? For instance, all of the images of the 2105 Super Ocean I have seen have green tritium (thanks to greene's9201 for the sample picture below) and I believe this is because because of some additive in the tritium used for these dials as they are all consistent.

That said, I have seen other examples where one example has the green hue present on the markers and another has the more commonly seen creamy tritium patina present on the markers. The difference could possibly have something to do with use/sun exposure, lighting for the photograph, etc. but I was wondering if there were some more knowledgeable members out there who had any definitive answers.
Green Hue:

Creamy patina

Thanks again for looking and any information you can share.
Best,
tcs