Need some Help RE: "A" Series Rolex Sub

[MartinF79]

Hi All -

New to the forum... first off, everyone on here seems very helpful and clearly, a tremdous level of knowledge.

I recently purchased a two-done SS/18K Gold blue dial Sub w/ a "P" series serial number. Absolutely love the watch!

Currently in the markey for a SS black sub. I've sourced an "A" series that I'm interested in. I've read up that 1998 was a transition year for the dials (from trillium to luminous). I plan on having the watch authenticated at a Rolex dealer, but was wondering if there is any way to confirm what type of dials the watch will have. I've been told that the Trilium are more collectable, however given the "radiation" myth, prefer the luminous hands.

Any insight anyone can share would be appreciated.

Martin