This lens arrived just two days later than the 2.3-6mm Computar zoom.
This is the best bargain ever! It's very new, I'd say, if it comes in a box, I would say it's a new lens! It comes with both lens cap, the lenses are in excellent condition, the coating is very nice, the focus and the aperture rings are all very nice and they give a firm feel.
It even comes with a IR pass filter, again in excellent condition, the filter is B+W from Germany, 40mm thread as measured roughly by a cheap ruler.
All for $6.5 USD only, even shipped! That's probably why I also got this one despite the Computar zoom can reach 6mm, too.