
The LEGO 4.5V train theme ran from 1966 until 1971 and contained 39 sets in all. The 4.5V trains used to be the voltage standard for the first electric LEGO components where the power came from a battery box with 3x 1.5V batteries.
1968 LEGO Sets
1968 was a landmark year with the opening of the first LEGOLAND park in Billund, Denmark, attracting hundreds of thousands of visitors. LEGO also introduced the first 12V train motor, spoked wheels, and magnetic couplers, greatly improving the realism of its Train line. The company refined packaging with photo-based idea layouts and transitioned away from the small-scale Town Plan system. This year also marked the arrival of Jens Nygaard Knudsen, who would go on to design the LEGO minifigure and shape future core themes.