Nearest I have is from an August 1980 ABC.
Note the BA Concorde flights were not BA1 etc then.
Westbound
BA173 LHR 0930 JFK 0829. Daily but not operated in August
AF001 CDG 1100 JFK 0845. Daily
BA171 LHR 1115 JFK 1014. Daily
Eastbound
BA172 JFK 1015 LHR 1900. Daily but not operated in August.
BA170 JFK 1215 LHR 2100. Daily
AF002 JFK 1300 CDG 2245. Daily
Notable both the BA westbound flights were in the morning, the pattern of one morning one evening came later. Gentler times then, business travellers didn't do a day's work in London then fly to New York. Also the first BA flight has quite a short 1 hour 45 minute turnround. Originally each Concorde was intended to do two round trips a day on the route.