Seamaster 2531.80 lume

@omegawatchlvr

I think that is because you actually have a <1998 Seamaster which has had the hands and bezel changed at service for SL lume items. That dial lume plot colour looks like tritium to me, in the first picture at least, the second is too washed out to judge. I would say that yours isn't one of the more obvious ones though, it is only a faint tint.

@Dr. K
Most tritium dial SMPs can be spotted by the slightly (or enormously) beige tint on the lume plots, the hands, even the tritium originals never seems to fade as much and often remain greener. Superluminova doesn't noticeably lose potency over time, not does it appreciably change colour unless it gets damp. If your lume no longer works and/or has faded to beige, it is more than likely not SL but tritium.

There is a way to spot an early SMP 2531 from the depth rating text, the font changed at some point in the 1990s, I think the tell was the loops on the 3 and the f in ft. I'll see if I can find a link to the info. The very earliest even lacked the Chronometer text in some cases and used a slightly different movement.

I had a 60.20m serial 2531 which definitely had a tritium dial, it was purchased in late 1997 (date on the card) so your may well have been in stock a couple of years before purchase. My GMT SMP (with SL dial, they all were) was on a 60.3m serial and dated at 1998, the year of its launch. Omega serials in this period can be deceptive, while these 2 watches were being made, the quartz versions were being shipped with serials in the 57m range. Very soon after the serials on the autos jumped to the 80m range, making dating SMPs from the serial very tricky.

EDIT: to make the relevance of this clearer, I would suggest that the cut off for a tritium dial auto SMP would be somewhere around the 60.2-60.3m serial number which may be of some use to the OP.