On my trip back in time I am closing in on my year of birth… For 1974 there was only one lonely set, 725, a 12V steam train with 4 wagons.
We skip 1973 as the oil-shock did not give us any further train sets, so we arrive at 1972, which is a very prolific year, only 1981 had more sets and 1969 had the same amount. Ten sets are following:
Set 181 is the set with the most carriages, never were 5 carriages reached again. Unfortunately the selection of wagons is not that great, three tipper wagons… plus the battery car.