Graf & sons is an Internet retailer.  Captech (aka Jamison or Jamison International) is an actual manufacturer.  They really do make the stuff.  I have not seen any of their Krag brass but I have used their 25-20 Single Shot brass and it is better than any of the WRACo or Remington brass from pre-WW2 days. 

I also have some of their 40-70 Sharps Straight brass.  I fired it in my Hepburn with heavy loads and it stretched.  Loads were probably too hot.