NEW Lego 9V Train World City 4512 Cargo Train SEALED 673419021371 | eBay
9V | Brickset: LEGO set guide and database
Huge Lego 9 volt train dream layout fully automated by Arduino - YouTube
With Lego back to 1991 again: 9V train set 4563, flat bed with tractor 4543, tanker car 4537 and level crossing 4539. Still cobbling together some parts, but getting there. - 9GAG
9V High Speed - recent experiences and questions - LEGO Train Tech - Eurobricks Forums