Help me ID this SF head

[WESBC]

I got this in a recent purchase and was unsure of its specific origin. I was able to thread it on a G2/6P with a P60 LA installed, but it sat further back creating a well pronounced ring around the edge of the beam.

thanks in advance

 

[jp2515]

Appears to be a Z32 shock isolated head

 

[WDR65]

If I'm not mistaken that's an older shock isolated bezel for using a P60 type lamp on a weapon. I think jp2515 is correct. I just couldn't remember the different versions.

 

[Size15's]

It's a Classic Z32. Simples...