This is for a 4mm scale pony truck chassis in brass.
Four Track Models 4mm Scale Brass Etch Please Choose From List
6 x 4mm Scale Brass Wagon Brake Gear Hangers Unused #1
Proprietary 4mm Scale OO Gauge Pony Truck Nice Condition #5 Pos Hornby Dublo
4mm Scale OO Gauge kitbuilt Pony Truck Sprung Return Nice Condition #9
4mm Scale OO Gauge kitbuilt Pony Truck Nice Condition #15
Scale Link 4mm Scale OO/EM Brass Etch / Fret ref F4 - Cast Iron Style Brackets