Blue vintage 1976 Carerra sunglasses

I just got these almost a year ago, I have a forest green pair identical to these, but they are NOWHERE to be found. I'm still on the search to find them, because I've had them for 3 years. It was a miracle to find a second pair of these. These get A LOT of attention due to the unique/weird style. Common questions; are your glasses upside down? why are your glasses backwards? why are your glasses like that? where did you get them? The shape is different, never seen anything like them. These are definitely worn a lot on my face! :-)