http://www.initialmsunglasses.com/M_VINTAGE_SUNGLASSES_COLLECTIONS/PERSOL_RATTI_809.htmlPERSOL RATTI 809 FOLDING.
These are another folding frame made by persol ratti.
I posted a few style of foldings but these model are quite rare to see them.
Most of persol folding models are aviator shape but these are square shape.
