Large Scale Central

"Deckless" cabs like the Tweetsie/B'mann 4-6-0

Here’s another site that has some great period photos of the Tweetsie, including some shots of crew members posing in front of the train.

http://www.johnsonsdepot.com/crumley/tour7a.htm

The cylindrical object you’re asking about covers up the center pin for the pilot truck.

Matthew (OV)