This brass quadrant with Gunter scales is an unusual example as the scales on the reverse scale read in the opposite direction to other quadrants of the same type.

A brass Gunter quadrant for latitude 51˚ North. Obverse: degree scale along circumference, divided anticlockwise 1-90, numbered by 10˚, subdivided to 1˚. The date scale runs from winter solstice to summer solstice and back again, divided to 2 days, except near the solstices. The Equator and Tropics are drawn parallel to circumference. Declination scale on left-hand edge <DIVIDED>. Line of the eclitpic