That looks like a Luke II based on the fact it has the Music Man 2 point tremolo, locking tuners, and EMG pickups (with the more modern EMG logo). The luke 1 would have had the EMG pickups (with the older logo) but with a floyd and locking nut, vs locking tuners. The Luke 3 would have had the same tremolo, but with Dimarzio Transition pickups, and the luke 4 would have had the EBMM pickups.