I put #58's on it later, also notice the wooden foot board and cab glass is missing as well. This was a shot I took right after weathering.
I believe you are correct. These are the parts from the detail kit: http://www.backwoodsminiatures.com/xbachdsl0002.jpg I never had a On30 layout, but just wanted to build this kit. I have since sold it on E-bay. Would love to still have it. Maybe this one next: http://www.backwoodsminiatures.com/xgmtropic.jpg ; )
Looks like the "next" possibility is also based on the Bachmann Gas Mechanical. I'm seeing kits now for two truck switchers. Which are badly needed. Unfortunately, prices without chassis are close to $100 for the kit alone. Add chassis, couplers, and...? Ouch! Boxcab E50