Mark Manley
Raleigh Fan
All Raleigh's of the period had a threaded bb unique to the brand. As for the cup design I have no idea.
Regarding fitting tools of the time it was well before me. That said I have some very old bb tools so I will have a look see .
As per Bagbuss' reply above, and should be paired with the Raleigh A-16N BB axle. It is unique to the post war Model 26 RRAs.
I'd be interested in buying that if it isn't already sold.