Devil 49 - the AW139 RFM specifically prohibits the use of polarised sunglasses in the cockpit because of the blanking effect they have on the MFDs/PFDs so it is clearly aircraft and display specific. I don't know what the S76 displays are like or if there are similar limitations.
Polarized sunglasses that worked just fine with the 76 IIDS and EFIS are totally useless with the 139 display. I quit wearing sunglasses in the 139 as I find the mesh screens and sun blind quite effective anyway.