From bicycle serial number CQ574685, March 1979. Marked SUN METAL PROD INC and dated 12 78 & 3 79. For use with semi pneumatic 16" tires. These have areas of scratching, scuffing and spot corrosion, but still present well. See my other listings for more parts from this cool little bike! Please feel free to communicate with me directly and ask questions. I'm happy to send a combined invoice once you've made your purchases, just ask.