I'm pretty sure it is one of the smaller live steam gauges: it weighs 80 pounds, which is not a huge amount. In 7.25" gauge this sucker would be the better part of ten feet long by 3 feet high and would weigh hundreds!
I decided this doesn't belong on my coffee table, so I e-mailed the SR&RL and told them it belongs in the Phillips Historical Society. I hope they got the message.
Pete, I'll stay with the LGB in my own yard: pays to keep it simple!
EDIT: The auction now says it's 2.5" gauge which makes it 1.25" scale. LGB track is 45mm gauge, which is 1.75".
This wouldn't have run on LGB track anyway. I think the broadest curves they have are about 4 foot radius. No way in George Mansfield's wildest dreams is a 3 foot long Forney bending around a 4 foot curve!