It does jog a few memories ---- recognising players etc. It was around 1984, I think.
Looking at the teams I think it was towards the end of the 1978-79.
If I remember correctly at the start of season(Aug-Sept 1978)
Widnes were reigning Champions.
Bradford won the Premiership in the May of 1978.
In the November of 1978 Widnes won the Lancs Cup & Bradford won the Yorks Cup.
Widnes then won the John Player Trophy in January 1979 & followed it by winning the BBC Floodlit Trophy,
Then Widnes went on to win the Challenge Cup.
Therefore towards the end of 1979 both clubs held all the trophies.
Widnes Held 5 Bradford held 2.