With the change-over to the new UIC numbering system valid from 1 January 1968, also 3yg-type wagons partly received new vehicle numbers suitable for EDP. Since sufficient modern n-type wagons were available in the vehicle fleet in the early seventies, the expectable remaining life of the 3yg-type wagons was easily assessable. Therefore the German Federal Railway (DB) implemented the new numbering system for the wagons only inconsistently. So, on all three subtypes, the main address field between the windows was indeed adjusted, and the vehicle number was placed centrally of the side panel, but on the AB3yg and BD3yg wagons, the old vehicle number was kept. From then on, the B3yg wagons travelled across the country with a modern EDP-suitable number.