This combination of a linear polarizer and a KR3 warming filter in a single housing is especially useful when dealing with excess blue like at high altitude or at mid-day in the desert. It's in excellent condition, clean and with no apparent scratches, rotates smoothly, and currently inhabits a non-original case. As far as I know these things have been discontinued for quite a while. Asking $55 shipped in the US, PayPal G&S is fine and I'll cover fees.
Shoot me a note with your email address if you feel you need pictures but in truth it's pretty boring to look at...