Looking at the 'new' Wayfarer in G15 green lens (will be grey market purchase). I'm finding confusing info on the lens material. Some sites are listing the RB2132 901 (52mm) with G15 plastic lens. Others are specifying the G15 as "glass" lens. I checked on Rayban's website and there's no mention of the material of the lens itself for the classic G15. Thanks in advance!