Hi... at a train show in Southern California yesterday, I picked up a Brass F9 in HO Scale that has a vintage Bachmann 8 wheel drive mechanism for power. The box reads that it was made by Gem, and the unit appears to mimic the style of a vintage Bachmann F9 piece. It appears to be brand new, and runs quite well. The only information that I could find about it on line was that around 1970, Gem produced Brass shells for Bachmann N Scale drives, which seems close... I would guess. Does anyone have any information about this piece that they could share? Thanks, Stephen.