The back contains 7 scales of the following types:
| Type (click to view scale details) |
Range & Units | Numbered | Geometry | Location |
|---|---|---|---|---|
| Altitude | 0 - 50, None | Every 5 | Circular, concentric | Upper right quadrant of outer circular on back of instrument. |
| Altitude | 0 - 50, None | Every 5 | Circular, concentric | Upper left quadrant of outer circular on back of instrument. |
| Sine/Cosine | None | Angle | Upper left quadrant (inside circular scales) | |
| Declination | None | Arc | Upper right quadrant (inside circular scales) | |
| Azimuth of Qibla | None | Arc | Upper right quadrant (inside circular scales) | |
| Altitude of noon sun | None | Arc | Upper right quadrant (inside circular scales) | |
| Shadow square | None | Box | All four sides of the shadow square, commonly found in the lower half of the center of the instrument. | |
| Triplicities | None | Inner Box | Box 'inside' the shadow square. Common site for triplicities, etc. |