Good luck with that. I tried it when I bought a M10 here a year or so ago. I called Gulf Breeze Firearms who are a large Dakota dealer. I was able to get an approximated DOM
I looked at some ones for sale that had the same prefix and numerically within a couple of hundred more than mine that were built around 2003 or so.
GW the “Ya” fellow Texan with all the beautiful rifles had a post with a certificate that showed his was made when Don Allen was still alive and the serial number shown had no prefixes.
So my hopes of this being and early Don Allen produced rifle are dashed.
The rifle is a sweetheart hope it shoots and doesn’t break mine