I would leave it alone for about a year. If you see new roots late next winter or early spring, then repot it.
The "B" could stand for Brassavola which is the older genus name for this particular species. It, and Rhyncholaelia digbyana were placed in this new genus in the early 80's I think. These two species do not really have that much in common with other Brassavolas so they were reclassified.
Brassavolas are generally stary shaped flowers, of thinner substance blooming with anywhere from 1-12 flowers per inflorescence. Their pseudobulbs are much more slender or rat tail like.
The Rhyncholaelias have pseudobulbs reminiscent of other Cattleya species.
The other thing that the B could stand for, and I have done this myself, if I divide a plant like this and end up with 2 plants, one would be Rhyncholaelia glauca 'Woltman' A and the other would be Rhyncholaelia glauca 'Woltman' B. This way I know that A and B were divisions of the same plant!