The 'Ray Ban' logo printed on the lens only appeared on later models from the 80's onwards, earlier examples with no lens logo printed are still genuine.
Ray Ban SILVER spare nose pads Aviator Outdoorsmen club master Oval and round
VINTAGE B&L RAY BAN GOLD PLATED OUTDOORSMAN AVIATOR SUNGLASSES w/CASE
RAY BAN Polarised Hand Made Italy RB 2157-K Parts Spare And Repair Temple Arms
Ray ban 3689 58 -lenses Replacement Spare Brown Faded Polarized
Ray ban 4147 60 - Lenses Spare Part - Brown Polarized
Ray ban 3492 62 Lenses Spare Part Green G15 G 15