The back contains 12 scales of the following types:
| Type (click to view scale details) |
Range & Units | Numbered | Geometry | Location |
|---|---|---|---|---|
| Altitude | 0 - 90, Degrees of arc | Every 6 degrees | Circular, concentric | Upper right quadrant of outer circular on back of instrument. |
| Altitude | 0 - 90, Degrees of arc | Every 6 degrees | Circular, concentric | Upper left quadrant of outer circular on back of instrument. |
| Cotangent | 0 - 60, Fingers | Every 6 fingers | Circular, concentric | Lower left quadrant of outer circular on back of instrument. |
| Cotangent | 0 - 60, Feet | Every 6 feet | Circular, concentric | Lower right quadrant of outer circular on back of instrument. |
| Shadow square | 0 - 12, Fingers | Every 1 fingers | Box | Left hand vertical 'face' of the shadow square (in LL) |
| Shadow square | 0 - 7, Feet | Every 1 feet | Box | Right hand bottom face of the shadow square (in LR) |
| Sine/Cosine | 0 - 60, 1/60 of quadrant radius | Not numbered | Arc | Upper left quadrant (inside circular scales) |
| Declination | Aries - Pisces, Zodiacal divisions, equal or unequal | Not numbered | Arc | Upper right quadrant (inside circular scales) |
| Prayer lines | 22 - 32, Degrees of latitude | Not numbered degrees | Arc | Upper right quadrant (inside circular scales) |
| Lunar Mansions | 0° Aries - 30° Pisces, Lunar mansion | Not numbered | Inner Circular, concentric | First circle within shadow square. |
| Zodiacal signs | Aries - Pisces, Zodiacal sign | Not numbered | Inner Circular, concentric | Second circle within shadow square. |
| Shadow square | 0 - 12, Fingers | ُevery 1 fingers | Box | Left hand bottom face of the shadow square (in LL) |
| Shadow square | 0 - 7, Feet | ُevery 1 feet | Box | Right hand vertical face of the shadow square (in LR) |