I carry a Prometheus Beta it has never come on in my pocket. I really like that it can be detached when desired but stays securely attached until I want it off.
I don't think the order is possible but based on my use:
Okluma DC1 Ti
Prometheus Delta
Prometheus Alpha Ti
HDS Rotary with 18650 tube
I know I came up with 4 but it was the best I could do 😎
I received my Blasted hex Delta Δ0040BL today and it is everything I expect from a Prometheus light. The hex pattern provides a very comfortable slip resistant surface.
Re: Alpha Serial Number Registry
In case you wanted to add a section for Delta's I have ^0024BL this one is a blasted finish Prometheus (Radial) groove wonder.
If you are describing the O-ring on the outside of the optic yes it is there (blue flourosilicate) I have not attempted to remove the bezel yet so if there is another o-ring in the head it is not visible.
I got my first one on Thursday so far I have not attempted to remove the bezel. So far it is everything I expected the spot optic is perfect for my use. Plenty bright to see 100 yards to the east corner of my property, spotted a fox last night. This is with the 319A 5k emitters the included...
Once here I will post some pictures according to Joy that both should be shipped by the end of next week and I normally get USPS priority shipments in 1 to 2 days from the bay area.
Prometheus Alpha with short tube
Prometheus Alpha Ti
HDS rotary with 18650 tube
Okluma dc1 or Dc2
Emisar d4s
Not carried but used daily
Fenix TK75
Acebeam T21vn
Wednesday the 7th I saw it around 1430 PDT and I jumped on it quick. They sold out fast, only 4 made per the description (so far) possibly more if they sold well per Jason.