Schenck, Ernest G; Official Gazette for Patents (US), 16 Dec 1902, p2558;
| # | Angle | Facets | Notes |
|---|---|---|---|
| G1 | 90.00° | 64 8162432404856 | |
| G2 | 90.00° | 412202836445260 | |
| P1 | 51.25° | 412202836445260 | |
| P2 | 49.02° | 64 8162432404856 | |
| P3 | 41.00° | 412202836445260 |
| # | Angle | Facets | Notes |
|---|---|---|---|
| C1 | 42.90° | 412202836445260 | |
| C2 | 35.00° | 64 8162432404856 | |
| C3 | 18.69° | 64 8162432404856 | |
| C4 | 11.41° | 412202836445260 | |
| T | 0.00° | 64 |