Lego train 7740 upgrade to powered up - tutorial - YouTube
Mecabricks.com | LEGO set 7740-1 Inter-City Passenger Train Set
Unofficial LEGO Sets/Parts Collectors Guide - The LEGO 12V Electric Trains of the 1980s were very popular among LEGO train collectors. The 1970s 12V trains (starting in 1969) were only sold in
LEGO 7740 Inter-City Passenger Train Set | BrickEconomy
LEGO 7740 Inter-City Passenger Train Set Instructions, Trains