I have a pair of Tortoise Shell polarized New Wayfarers that are 55 mm. They are too big for my face, so I'm getting rid of them.
I'd also be willing to trade for the 52 mm in black or tortoise.
They were purchased at Sunglass Hut for me last year before Christmas, so they're definitely legit. I have the case and cloth they came with.
I'll post pics when I get home today, but they've only been worn once and look brand new.