| Slot Machine |  Rio | 1938 | Mills Novelty Co. Chicago, IL, USA |
| Pinball | Ritz | 1938 | Stoner Mfg. Corp. Aurora, IL, USA |
| Pinball | Robin Hood | 1938 | Daval Mfg. Co. Chicago, IL, USA |
| Coin-op Misc. game | Rock-O-Ball All Electric model | 1938 | Rock-Ola Mfg. Corp. Chicago, IL, USA |
| Pinball | Rocket of 1938 Model 222 | 1938 | Bally Mfg. Co. Chicago, IL, USA |
| Slot Machine | Rol-A-Top 5-Pull Front Vender | 1938 | Watling Mfg. Co. Chicago, IL, USA |
| Slot Machine | Rol-A-Top 5-Pull Gold Award Vender | 1938 | Watling Mfg. Co. Chicago, IL, USA |
| Slot Machine | Rol-A-Top Cherry Bell 5-Pull model | 1938 | Watling Mfg. Co. Chicago, IL, USA |
| Slot Machine | Rol-A-Top Diamond Bell Front Vender | 1938 | Watling Mfg. Co. Chicago, IL, USA |
| Slot Machine | Rol-A-Top Diamond Bell | 1938 | Watling Mfg. Co. Chicago, IL, USA |
| Slot Machine | Rol-A-Top Future Play Front Vender | 1938 | Watling Mfg. Co. Chicago, IL, USA |
| Slot Machine | Rol-A-Top Future Play | 1938 | Watling Mfg. Co. Chicago, IL, USA |
| Slot Machine | Rol-A-Top Improved Cherry Bell | 1938 | Watling Mfg. Co. Chicago, IL, USA |
| Bowler | Roll-A-Ball | 1938 | Square Amusements Co. Poughkeepsie, NY, USA |
| Slot Machine | Rolletto Sr. | 1938 | Evans & Co., H.C. Chicago, IL, USA |
| Trade Stimulator | Rolo | 1938 | Superior Games Mfg. Co. New York, NY, USA |
| Trade Stimulator | Safe Hit | 1938 | Daval Mfg. Co. Chicago, IL, USA |
| Pinball | Sea Biscuit Model 299 | 1938 | Bally Mfg. Co. Chicago, IL, USA |
| Trade Stimulator | Seven Grand | 1938 | Withey Co., B.A. Chicago, IL, USA |
| Pinball | Shoot the Moon | 1938 | ESCO Exhibit Supply Co. Chicago, IL, USA |
| Coin-op Misc. game | Skill Time | 1938 | Keeney & Co., J.H. Chicago, IL, USA |
| Non-Coin Game | Skilo | 1938 | Bonus Sales Co. MA, USA |
| Slot Machine | Sky Chief Bell | 1938 | Jennings & Co., O.D. Chicago, IL, USA |
| Slot Machine | Sky Chief Vender | 1938 | Jennings & Co., O.D. Chicago, IL, USA |
| Pinball | Slugger | 1938 | Gottlieb & Co., D. Chicago, IL, USA |
| Trade Stimulator | Smoke Reels | 1938 | Daval Mfg. Co. Chicago, IL, USA |
| Trade Stimulator | Smoke Reels Gum Vendor | 1938 | Daval Mfg. Co. Chicago, IL, USA |
| Pinball | Snappy | 1938 | Chicago Coin Machine Co. IL, USA |
| Trade Stimulator | Sparks Delux | 1938 | Groetchen Tool & Mfg. Co. Chicago, IL, USA |
| Trade Stimulator | Sparks Jackpot | 1938 | Groetchen Tool & Mfg. Co. Chicago, IL, USA |
| Pinball | Spokes | 1938 | Chicago Coin Machine Co. IL, USA |
| Pinball | Sport Page Model 172 | 1938 | Bally Mfg. Co. Chicago, IL, USA |
| Trade Stimulator | Square Shooter | 1938 | Star Mfg. & Sales Co. Kansas City, MO, USA |
| Pinball | St. Moritz Alps Model 56 | 1938 | Chicago Coin Machine Co. IL, USA |
| Pinball | St. Moritz Model 55 | 1938 | Chicago Coin Machine Co. IL, USA |
| Pinball | Stable Mates | 1938 | Keeney & Co., J.H. Chicago, IL, USA |
| Trade Stimulator | Steeple Races | 1938 | Gottlieb & Co., D. Chicago, IL, USA |
| Slot Machine | Strikette | 1938 | Shyvers Mfg. Co. Chicago, IL, USA |
| Pinball | Super-Zeta | 1938 | Stoner Mfg. Corp. Aurora, IL, USA |
| Trade Stimulator | Susie Q | 1938 | ESCO Exhibit Supply Co. Chicago, IL, USA |
