Wood, St John; Official Gazette for Patents (US), 14 Oct 1902, p439;
| # | Angle | Facets | Notes |
|---|---|---|---|
| G1 | 90.00° | 1 3 5 7 911131517192123252729313335373941434547495153555759616365676971737577798183858789919395 | |
| P1 | 57.20° | 3 91521273339455157636975818793 | |
| P2 | 54.00° | 618304254667890 | |
| P3 | 41.00° | 618304254667890 |
| # | Angle | Facets | Notes |
|---|---|---|---|
| C1 | 38.00° | 3 91521273339455157636975818793 | |
| C2 | 35.00° | 618304254667890 | |
| C3 | 30.00° | 9612243648607284 | |
| C4 | 23.50° | 618304254667890 |