Once I learned what a "4-digit" serial number #1 was, my dream was to own one in .280 Remington. Congrats on your find! I learned about the configuration when I found a 1968 4-Digit chambered in 30/06. I wasn't in the market for a 30/06, but when I threw that rifle up to my shoulder it felt like it was custom-made for me. I struck a deal and it became mine! Part of me still yearns for a .280, but I soon figured out why the 30/06 is probably the most popular hunting round on the globe.