bus-photo.net - London bus route 13 was originally running between London Bridge and Hendon. By 1950s Hendon-Golders Green section was withdrawn. In 1970 the 13 was cut back from London Bridge to
Route 13
13 Route: Schedules, Stops & Maps - City Centre (Updated)
Does the number 13 bus still cross London? An essay in an old anthology recommended taking it as the best way to see London, better than sightseeing buses. - Quora
Route 13 – Corcoran – KART – Kings Area Regional Transit
13 Bus Route - King County Metro - Puget Sound Transit
London Buses route 13 | UK Transport Wiki | Fandom