1:87 Scale. An HO scale model GS-4 Locomotive provides a graphic comparison of 3.5mm to the foot railroading vs. 12" to the foot scale. The young gentleman who owned that little Daylight was a participant in this October, 2018 Lerro Productions photo shoot. My understanding is that he's a long-time railfan, and 4449 has always been his favorite locomotive. The HO scale model was given to him as a gift by his girlfriend. On this day, he was seeing the real thing for the very first time. As dusk approached, he used that 12" to the foot model as a back-drop to propose to his girlfriend, with Pete Lerro there to record photos of her response.....which was a pretty emphatic YES! It was a pretty good day for this particular Daylight fan.