Hi, 
 
I bought a Racing Jacket on ebay with the box and sack as well and from the size of the lenses (65 mm wide) I assume it is a Gen 1.  
Turned out my sweat has dissolved the lenses inside and I need replacements. (Is this even normal?) 
 
Because of the above mentioned events I'm really curious if I have a genuine Oakley or I bought a fake one on ebay. I don't see any numbers written on the inside of the frame although I see a lot of reference to it on the internet.  
 
Can you please help me figuring out this? 
Here are some images: 
https://goo.gl/photos/aGJBfHtM3NCR4xX8A 
 
Thanks for your help in advance