New Style Hoya Circ Pol
I bought a used Hoya 77mm Cir Pol (uncoated) from B&H recently, & was surprised that it looked different from my other ones. It came in an indigo box, unlike the usual green one.
At first, I thought it could be a fake, but after investigating, I've concluded it's legit.
It's made in the Philippines. The aft (male-threaded) ring is knurled, whereas the fwd (rotating) ring is not (but the rim is serrated). This might make adjusting the filter a bit more difficult, but it makes putting the filter on & taking it off easier.
The properties of the glass / film assembly (color, reflectivity, polarizing effect) appear identical to my other Hoya pols.