Look at where it says PAT'D ...then look for the number of dots after that. One dot is take A, two is take B, ect. The numbers following mean it was produced on that number mold. ex: PAT'D..18 This would mean take B or (two) using mold number 18. Btw...the Mainspring book is not out yet as far as I know and only covers 1926-1929. I hope they will reprint the rest of the DD information prior to that. Bruce ps Seems like I have that record here someplace. If I can find it, it's yours. I am not a Dalhart fan.