Steel, Herman D; Official Gazette for Patents (US), 4 Oct 1921;
| # | Angle | Facets | Notes |
|---|---|---|---|
| G1 | 90.00° | 1 3 5 7 911131517192123252729313335373941434547495153555759616365676971737577798183858789919395 | |
| P1 | 56.65° | 618304254667890 | |
| P2 | 53.00° | 9612243648607284 | |
| P3 | 48.00° | 9612243648607284 | |
| P4 | 43.00° | 9612243648607284 |
| # | Angle | Facets | Notes |
|---|---|---|---|
| C1 | 49.35° | 96244872 | |
| C2 | 43.90° | 717314155657989 | |
| C3 | 37.00° | 12366084 | |
| C4 | 28.05° | 96244872 | |
| T | 0.00° | 96 |