My 1947 B31.
I ride this most weekends, even during winter when the roads are dry. Have ridden in as cold as 2 degrees C, the B31 ran perfectly although I struggled.
Got some photos today when riding in the sunshine.
That's very pretty. Same colours as my '54 plunger model, which is slowly reaching a roadworthy condition. Very nice!
I've also acquired a B31 plunger 1954 in the same colour too! Not running yet. A project for the coming year....