All of the current display back Speedies have the upgraded 1863 movements.
And kymwatchlog is correct about the grey "halo" at the edge of the crystal adjacent to the bezel. Here is the "chocolate" Speedy that I once owned:
I've owned a couple of dozen Speedy Pros over the years and much prefer the warmer look and feel of the hesalite. Hesalite scratches are an non-issue IMO. I think I have polished the crystal on my vintage 105.012 only once in the eight years I have owned it. A little Polywatch and a couple of minutes of polishing is all it takes to have the crystal looking like new.
But as kymwatchlog said, you can't go wrong with a Speedy Pro.