Astrolabes /
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    Equal hours
| Type: | Equal hours | 
| Style: | Equal hours, single | 
| Geometry: | Arc | 
| Unit of measurement: | Times of day | 
| (Numbering) starts at: | 0 | 
| (Numbering) ends at: | 12 | 
| Numbered: | every hour | 
| Repeats: | 1 times | 
| Divided every: | 1 (Times of day) | 
| Notes: | Two lines of numbers (1-11) that follow the arcs of the two tropics, but relate to the meridian lines | 
Scale located on: Universal astrolabe .