Their website says that my RM50B should have came with an 8 ohm Celestion G12T-75, but it actually came with a 16 ohm.
As somebody mentioned somewhere, it appears at times that Randall doesn't have a lot attention to detail.
I can live with a different ohm speaker, but I'm not sure I'd be too happy about getting a totally different style of power tubes. I'd probably call my dealer or Randall to see if they could supply the tubes they were supposed to.