Section 16 is Monopoly boards as Clarion said
16.3 Robinson Road, Shenton Way, Collyer Way - Singapore
16.5 Strandvägen, Kungsträdgårdsgatan, Hamngatan - Swedish
16.6 Avenue Matignon, Boulevard Malesherbes, Avenue Henri-Martin - French
16.9 Abbey Street, Capel Street, Henry Street - Irish
Also
8.4 - Congo Red - a Ph indicator with the opposite colour change to litmus