| Clue | Source | Date |
|---|---|---|
| Bygone medical device used in electrotherapy ? or a description of 111-Across? | New York Times | 04 Jun 2023 |
| Bygone medical device used in electrotherapy ... or a description of 111-Across? | New York Times | 04 Jun 2023 |
| *Antique medical device used for electrotherapy | New York Times | 19 Mar 2018 |
| *Antique medical device used for electrotherapy | ||
| Part of the spectrum. |