Hi Astonian
The Jewellery Quarter has changed a bit, but there is still quite a bit of the old left. The Rose Villa Tavern is still there, the Red Lion building is (but it might be closed now, not sure), and as Charlie said, the Jewellers Arms is. The old Smith and Pepper building in Vyse Street is now a museum and worth a visit (it's free and you get a proper tour) and the old Wylie Pen Factory is now a pen museum. If you are going to spend a little time there, you might be able to see both museums, but the Pen Room is at the end of Frederick Street, near Legge Lane, so a bit of a step from the other museum. I love it round there, my family came from Key Hill, and another line lived in Crabtree Road, which is the other side of Icknield Street.
Best wishes
Shortie