| Number | Name | Date | Kind |
|---|---|---|---|
| D259186 | Perrin | May 1981 | |
| 1234204 | O'Brien | Jul 1917 |
| Entry |
|---|
| Swiss Watch & Jewelry Journal-3/80-p. 415-Watch at top left. |
| Jeweler's Circular-Keystone-7/78-p. 253-Watch at top right. |
| European Jeweler-6/72-p. 100-Watch at top right. |
| Jeweler's Circular-Keystone-7/78, p. 205-Watch. |