Historical Note
- A.C. Gilbert
- Alco Models
- American Models
- Central Hobby Supply
- Dayton Model Products
- Exacta Scale Models
- Hartoy
- Kinsman Scale Models
- Lionel
- Midgage Models
- MTH
- Old Pullman
- Overland Models
- Pacific Rail Shops
- Pennsylvania Heritage Models
- Perma-Bilt Models
- River Raisin Models
- Robert L Miller Laboratory
- S Scale Locomotive & Supply
- S-Helper Service
- Triangle Scale Models
- Ye Olde Huff-N-Puff