LEGO Trains / 12V

12V is a subtheme of Trains that consists of 17 sets that ran from 1969 to 1970. Most sets were released in 1969 which accounted for 13 sets. As of today, the average annual growth of all the sets in Trains 12V is around 4.2% per year. As of today, 722-2 12V Electric Train with 2 Wagons is the most valuable set in Trains 12V with an estimated new/factory sealed value of $974.45.

Most valuable LEGO 12V set
722-2 12V Electric Train with 2 Wagons - $974.45

Highest growth 12V set
704 12V Sleeper Track Contacts - 7141.33%

Largest LEGO 12V set
720-2 Train with 12V Electric Motor - 369 pieces

Most owned 12V set
750 8 Straight 12V Conducting Rails

In 1969 LEGO released the 12 volt train sets as part of the Blue Era which was named because of the rail color. These 12V train sets used additional conductor rails mounted between the standard 4.5V rails and 12V motors contained in the same housings as the 4.5V motors, but with additional metal contacts attached to the bottom of the housings.

LEGO Trains is one of the longer running themes that dates back from 1966 and ran up until 2006. During its run there were multiple sets released running on various power platforms from 4.5volt, to 9 and 12 volt sets. Later in 2011 LEGO released additional train sets using RC and Power Functions controllers under different themes like City.