I present to you, lego train on O-gauge track : r/LEGOtrains
LEGO Skarloey. Also built in 1:38 / 1 Stud ≈ 1 Foot scale... Which means this narrow-gauge engine is as wide as a standard-gauge train from an official LEGO set. : r/LEGOtrains
LEGO MOC Narrow Gauge Train - Borkumer Kleinbahn by asper | Rebrickable - Build with LEGO
Narrow gauge - The Brothers Brick | The Brothers Brick
Lego Accessories Light Bluish Gray Tile 1 x 2 with Red 82, Yellow and White Gauges Pattern (La Petite Brique)
Tile 1 x 1 with Groove with White and Red Gauge, Black Thick Needle, and Screw Heads Pattern : Part 3070bp07 | BrickLink
LEGO narrow gauge locomotive models - LUKR
Narrow Gauge Steam Engine - Lord Basil and Wyvern | If you w… | Flickr