| Type | Title | Year | Publisher |
|---|---|---|---|
| Trade Stimulator | 🟩 Advertising and Discount Machine | 1900 | Yale Wonder Clock Co. [Burlington, VT, USA] |
| Trade Stimulator | 🟩 Automatic Cashier and Discount Machine | 1905 | Yale Wonder Clock Co. [Burlington, VT, USA] |
| Trade Stimulator | 🟩 The Yale Wonder Clock | 1899 | Yale Wonder Clock Co. [Burlington, VT, USA] |