| Number | Date | Country | Kind |
|---|---|---|---|
| DM/019 111 | Mar 1991 | XHX |
| Number | Name | Date | Kind |
|---|---|---|---|
| D6098 | Mathey | Sep 1872 | |
| D12926 | Stauffer | May 1882 | |
| D18821 | Ward | Dec 1888 | |
| 580046 | Harrington | Apr 1897 | |
| 865652 | Montandon et al. | Sep 1907 |
| Entry |
|---|
| Swiss Watch and Jewelry Journal, Mar. 1988, p. 494, see circled Watch-center page. |
| Jewelers' Circular-Keystone Mar. 1988, p. 85 see circled Watch-center page. |