What E-Series Head is this?

[BIGLOU]

A non-flashaholic friend brought me this E2E with what looks like a KL1 head. I searched and didnt find anything. I did see that there has been different generations, but what generation is this one that has a removable bezel ring? Have seen photos of what looks like one piece heads but not any with the screw type bezel ring. Now my next question is where can i get a bezel? Is there a Lego bezel that fits? Can someone confirm what this head is? Lux I, Lux II, Lux III, TIR Optics or Domed TIR lens? Thanks. (EDIT: Sorry just noticed I put this on the Incan. Thread. Can a Mod move this for me. Thanks)