LEGO - Tog - 7725 - Elektrisk passasjertog rød 12 volt - Catawiki
BrickLink - Set 7725-1 : LEGO Electric Passenger Train [Train:12V] - BrickLink Reference Catalog
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
Trains | 1980 | Brickset: LEGO set guide and database