@prrjim posted:The 671 is a classic Lionel loco. it has good proportions. However, it is not anywhere near O scale. I saw a Sunset Brass O Scale PRR Turbine at a show and was in awe about how big it was. the Lionel one is very much undersized, might be S scale. it will go around 031 curves however.
funny i just got my 2020 redone and when i took it out of the box ,yes,,,yeaks looked so small,i have had it for 35yrs or so,,but i really like it ,thought it might like a big brother !