The back contains 15 scales of the following types:
| Type (click to view scale details) |
Range & Units | Numbered | Geometry | Location |
|---|---|---|---|---|
| Altitude | 0 - 90, Degrees | Every 5 degrees | Circular, concentric | Upper right quadrant of outer circular on back of instrument. |
| Altitude | 0 - 90, Degrees | Every 5 degrees | Circular, concentric | Upper left quadrant of outer circular on back of instrument. |
| Declination | Gemini/Cancer - Sagittarius/Capricorn, Zodiacal divisions, equal or unequal | Not numbered | Arc | Upper right quadrant (inside circular scales) |
| Azimuth of Qibla | Cities | Not numbered | Arc | Upper right quadrant (inside circular scales) |
| Altitude of noon sun | 32 - 44, Degrees of latitude | Every 3 degrees | Arc | Upper right quadrant (inside circular scales) |
| Sine/Cosine | 1/60 of quadrant radius | Not numbered | Angle | Upper left quadrant (inside circular scales) |
| Cotangent | 0 - 35, Feet | Every 5 feet | Circular, concentric | Lower left quadrant of outer circular on back of instrument. |
| Cotangent | 0 - 50, Fingers | Every 5 fingers | Circular, concentric | Lower right quadrant of outer circular on back of instrument. |
| Terms | 0° Aries - 30° Pisces, Zodiacal divisions, equal or unequal | At each term | Inner Circular, concentric | half circle inside the outer circle (on mashriqi astrolabes) - covering LL and LR |
| Zodiacal signs | Aries - Pisces, Zodiacal sign | Not numbered | Inner Circular, concentric | half circle inside the V circle (on mashriqi astrolabes) - covering LL and LR |
| Faces | 0° Aries - 30° Pisces, Astrological face | Not numbered | Inner Circular, concentric | half circle inside the VI circle (on mashriqi astrolabes) - covering LL and LR |
| Lunar Mansions | 0° Aries - 30° Pisces, Lunar mansion | Not numbered | Inner Circular, concentric | half circle inside the VII circle (on mashriqi astrolabes) - covering LL and LR |
| Shadow square | 0 - 7, Feet | Every 2 feet | Box | Left hand vertical 'face' of the shadow square (in LL) |
| Shadow square | 0 - 7, Feet | Every 2 feet | Box | Left hand bottom face of the shadow square (in LL) |
| Shadow square | 0 - 12, Fingers | Every 2 fingers | Box | Right hand bottom face of the shadow square (in LR) |
| Shadow square | 0 - 12, Fingers | Every 2 fingers | Box | Right hand vertical face of the shadow square (in LR) |
| Transcription | Translation | Notes | Type |
|---|---|---|---|
| صنعه محمد طاهر | Made by Muḥammad Ṭāhir | In cartouche below shadow square | Maker's signature |
| نمقه عبد الائمة | Embellished by ʿAbd al-Aʾimmah | In cartouche at bottom rim | Maker's signature |