More from mine and my sons train room messing around with the old and new. Getting 6 trains running on three loops was tricky! The 12v sets (especially... | By LEGO 4.5v/12v
7745 12 Volt High Speed Train - Brickipedia, the LEGO Wiki
LEGO 7735 12v Cargo Train Set Parts Inventory and Instructions - LEGO Reference Guide