STOKE NEWINGTON - Newington Green - Canonbury - Angel - Kings Cross - Euston - Tottenham Court Road - Oxford Circus - Marble Arch - Hyde Park Corner - Knightsbridge - Kensington - Hammersmith - Castelnau  -  BARNES POND ( Mon-Sat peaks )
Prior to this date had been numbered 173A, 173D and 173E

23.03.37
Last day of operation