Four dots are engraved into the tab and just above
the central hole.
Circles
| Type |
Labelled |
Style |
Notes |
| Equator |
|
Plain line. |
|
| Tropic of Cancer |
|
Plain line. |
|
| Tropic of Capricorn |
|
Plain line. |
|
Lines
| Type |
Labelled |
Description |
| Horoscopic (great) houses |
|
|
| Meridian line |
|
|
| Horizon rectus |
|
|
| Horizon obliquus |
|
|