There are some "small teeth" on the bezel from the factory. Sharp enough to eat itself through the pocket of your trousers when you have it in there always. I have two E1Es and they both have exactly the same bezel, so that should be original. It looks exactly like this one:
https://www.captaindanns.com/product/surefire-e1e-executive-elite/
I used to run it with the Lumens Factory 50 Lumens version of the bulb you just recommended. The 90 Lumens version draws something like 1.3 Amps (I have one, tried it, but abandoned the idea to use this one due to be too hard on the small cell, and the runtime that's too short) while the 50 Lumens version just draws 0.8 Amps. And still gives a lot of light
That is referred to as the "semi-crenulated" version of bezel. There are aggressive crenulated versions of bezels for the M6 and M4 that go beyond the smooth and semi-crenelated versions, but they are not very common. The strike bezel is an entirely different thing, and found on the E2D Defender.
The 1.3A is really not hard on the cell if you get an IMR cell. But if you're good with the 50 lumens, that's also plenty of high quality light, and a bit better runtime.
