North America – At least we had 4.5 Volt (1982) | Brick Model Railroader
LEGO Trains 1980 | Brickset
LEGO Set 7822-1 Railway Station (1980 Train > 4.5V) | Rebrickable - Build with LEGO
Unofficial LEGO Sets/Parts Collectors Guide - Among many LEGO Train collectors, the golden age was 1980-1990... the 12V electric train years. And probably the most popular was the 7740 Intercity Train (not