Unequal hours
| Type: | Unequal hours | 
| Style: | Unequal hours, double | 
| Geometry: | Arc | 
| Unit of measurement: | 1/12 of daylight | 
| (Numbering) starts at: | 1 | 
| (Numbering) ends at: | 12 | 
| Numbered: | Every 1 | 
| Repeats: | 2 times | 
| Divided every: | 15 (1/12 of daylight) | 
| Notes: | This is a scale to convert between equal and unequal hours | 
Scale located on: Tympan, Womb or Back .
Location(s) detail:
| Upper half: | The upper two quadrants of the back of the instrument (Upper half) | 
Inscription(s):
| Type: | Scale label | 
| Content: | Horæ inequales | 
| Translation: | Unequal hours | 
| Language: | Latin | 
| Script: | Humanist miniscule | 
| Notes: | |
| ---------- | |
| Type: | Scale label | 
| Content: | HORÆ ÆQVALES | 
| Translation: | Equal hours | 
| Language: | Latin | 
| Script: | Square capitals | 
| Notes: | |
| ---------- | |
| Type: | Scale label | 
| Content: | Horæ ante meridiem | 
| Translation: | Hours before noon | 
| Language: | Latin | 
| Script: | Humanist miniscule | 
| Notes: | |
| ---------- | |
| Type: | Scale label | 
| Content: | Horæ post meridiem | 
| Translation: | Hours after noon | 
| Language: | Latin | 
| Script: | Humanist miniscule | 
| Notes: | |
| ---------- |