PenguHBanswered grow question 3 years ago Unless it has VERY distinctive genetics, noone would be able to identify it I am afraid.
By the looks of it, it is already flowering. If you are not sure if it is an auto or photoperiod, it would be safe to stick with 12/12 schedule. Autos are fine with 12/12, but if you wanted to force 18/6 on a flowering photoperiod, you could trigger revegging which would wreck the grow.
The plant does not look any older that 1.5 - 2 months depending on the strain. Good luck!