4″ National Upsetter
- Serial: 16034
- Forge Tons: 800
- Grip Open: 6″
- Stroke: 13.5″
- SPM: 25
- Grip Tons: 400
- Gather: 6.2″
- Hold: 3″
- Die Space Length: 21.5″
- Die Space Height: 26″
- Thickness of Each Die: 8.1″
- Main Motor: 50 HP
- Machine Length: 192″
- Machine Width: 135″
- Header Slide Die Space: 45.2″
