I picked up a Scott 299 recently. Missing all 12ax7 tubes, one 7189 and a 5AR4 tube.
Looks like it is a 299; not a A, B, C, or D. Serial number 40812.
I did find some NOS 6BL8 tubes in my stash. I plan to clean it up, replace or bypass the PS caps, add fresh coupling caps and get it...