I also have a Dulcetta ukele bango with BS in the musical triangle. I bought it for 10p in a jumble sale in the mid 70's. The fret board veneer was damaged and the vellum torn. I replaced the veneer, re-fretted, and replaced the vellum. It has four rosewood tuning pegs and is still in good fettle. I never got around to playing it properly. It also has a five figure number stamped on the back of the head, is it possible that this could be used to date it?

Rog