Milwaukee Road Engine No. 261.
In 1991, the newly formed "North Star Rail" selected 261 for restoration for mainline excursions. It was selected for a variety of reasons. The engine was large enough to handle the expected trains at track speed. It featured several modern features for a steam locomotive, including easier to maintain roller bearings. It also already had its asbestos lagging removed, which is very expensive to remove for environmental and safety reasons. Finally, 261's relatively short 10 year service life meant that the engine's boiler is more pristine, meaning it would take less work to rebuild the engine. -Wikipedia.