RamBros Workshop Undecorated Steel-sheathed Waffle-sided, Single-door Box Cars

RamBros Workshop (click for web site)

steel-sheathed waffle-sided, single-door

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3D-printer file

This company is the originator of this "open source" car design. Since it is open source, you will find others whom have enhanced the design, and yet others who make the actual 3D-printed models available for sale. This company only makes the 3D-printer files available.