Era: 1966 to present
- Upgraded tooling
- Celcon handrails, hood mounted or walkway mounted per prototype
- Separately applied wire grab irons
- Flush window glazing
- Separately applied air tanks and piping
- Operating headlights utilizing microbulbs
- DCC ready using QuickPlug technology
- Photo etched radiator grills
- Cab interior
- DCC ready
- McHenry scale knuckle spring couplers
- Upgraded hex drive train
- Prototype specific details, such as:
- Headlights
- Grilles
- Air horns
- Bells
- Truck sideframes
- Spark Arrestors