Wall of Death? Typo or nickname for that line? (don't know much about it, have never visited the Sutton-Epsom area either by road or rail...)
In 1985 this went to Victoria via the main line (Selhurst) - not Crystal Palace. In the opposite direction it was advertised in the timetable as 'West Sutton' but then actually continued to Wimbledon and on to Holborn. I remember 'revising' the 10-minute-interval suburban stoppers out of Victoria in preparation for a visit to Clapham Junction, so I knew what was coming when - and the pattern was xx02 'West Sutton' (actually Holborn), xx12 West Croydon, xx22 Epsom Downs, xx32 West Croydon, xx42 'West Sutton' (Holborn again), and xx52 Beckenham Junction - alternating between main line (02, 22 and 42) and Crystal Palace (12, 32, 52). As an aside you also had Dorkings at xx19 and xx49, IIRC which omitted Battersea Park and Wandsworth Common.