| Number | Name | Date | Kind |
|---|---|---|---|
| D. 336140 | Lavery | Jun 1993 | |
| 3087279 | Thompson | Apr 1963 | |
| 4976063 | Young | Dec 1990 | |
| 4986042 | Richardt | Jan 1991 |
| Number | Date | Country |
|---|---|---|
| 2414674 | Oct 1975 | DE |
| Entry |
|---|
| Facing Tilie Institute; Structural Clay Facing Tile Handbook, 59HB; Round top cove base #4D520A and #4D524R, p. 11. |