Agreed, there are at least 2 dials known, and that is excluding stuff like the Targa Florio which are wildly different. Note the later SL lume one has the 3 minute telephone timer marks as seen on many 40s chronos, they are missing on the earlier tritium dial.
I don't like the spear sub dial hands on the OP watch. In my experience, the mixed rounded yellow/straight white set was used on all original Dynamic chronographs. A quick google search shows nothing like those on the OP watch and mine were nothing like that as far as I remember. I think those are not original.
Here is mine (now gone) later SL dial, normal hands:
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