The special OC44 transistors used in the RM Majestic are part of a high-grade stash of which BSM managed to get a very small amount from Valvo and Philips. Those are from 1959 and were meant to use inside professional measuring instruments.
The RM Majestic is much more transparent than the stock RM model according to BSM. The Majestic series is limited to 25 pieces.
For more information, visit their web site at www.treblebooster.net.