HI---need and would like to buy C9AF-9510-N ---LIST 4280 ---date code month C,D, E --OR EARLY F---concourse correct or core
https://www.saacforum.com/index.php?topic=11728.0,check out this link,he has 3 4280 and his work is second to none!!
I have a core dated 921. Let me know if you want more info.