I have spare lens that came with the lens decal unaffixed some where so that dosen't really throw up a red flag to me.
I looks to me to be a "paint effect" like cow print frogskins, Wildberry n'Milk frogskins, carbon fiber or splatters blades.
Someone could have done a custom job like the home made black leather Mars.
The real question is whether or not the earstems have snake on them.
and we really need close ups on it