Question on 2531.80 Lume

Yes, early models were tritium...

I'm not Archer, but I have owned a few of these inc both watches you refer to above so if I could throw in my 2p worth, the early tritium Bond SMP, that is to say made before 1997 will have lume which is next to useless but might make up for this with patina. The later examples will have lume as strong as when it left the factory. In the case of the skeletonised hands, I am afraid that is to say not very visible! There was an alternative SMP design made between 1997-2008 or so known as the Sword Hands model. This took cues from the SM300 dive watches from the 1960s and in fact has extremely bright and long lasting lume. Examples of this model include the 2254.50, but there are dozens of variations all with similarly useful lume. I do love the Bond design which is redolent of the 1990s and will forever have the 007 link (for better or worse), but the sword hands models, sometimes known as the Blake Seamasters, are actually a better dive or low light watch.

To comment on your comparison, neither the Bond SMP nor AT have wonderful lume. Nor for that matter do the current skeleton hands SMP watches. I have a NTTD and it isnt much better than a 2531.50 Bond.