Years ago I had an '03 with a 1921 barrel date. But I envisioned myself to be a "true collector" of military guns and I wanted one with a WWI date so I sold it. I have waited more than a decade to buy another and gave up on a WWI date that I could afford.
So I bought one at Cabela's with a 1930 barrel. I was disappointed until I googled the serial number and found that the receiver was made in 1930 so the barrel is correct for the rifle. It also came with a CMP certificate of authenticity showing that they sold it in 2004.