NORS set of gl*** lenses for your 50 Merc. The originals were clear plastic. Replacements were typically made of gl***. These are the version that have a cool looking purple tint to them. $25 shipped CONUS PayPal friends and family. Buy with confidence. I've done many good deals here with HAMBers over the last few years. I have 1000+ 100% positive feedbacks since 1999 on Ebay under username rw4951.
The Jalopy Journal
