This is a portable brass refracting telescope on a conical pillar and tripod stand. This telescope belonged to Lt. Cdr. R. B. Davidson RN who was given it by his father.

It is a telescope with an object glass of three inches aperture (7.6cm) with a focal length of 106.6 cm (42inches). Fully extended the telescope is 119.4cm in length. There is a small refracting sighting telescope on top of the main barrel with a cross wire and brass cap at the object glass end. Engraved on the top of the main barrel it says 'ALEXANDER DAVIDSON 1890'. Engraved on the eye end of the telescope an inscription reads 'Ross, London, no. 22622'.

The stand is detachable and can be attached to the side of the telescope. The inclination movement, and rotary movement are from the base of the pillar, and there are two wooden handled jointed rods for fine adjustment of inclination and rotary movements. The handle on the side of the tube is for extending the telescope.

The origional wooden box has survived with this telescope, which is 109cm in length. Fitted within the box are the following accessories: five eyepieces, four coloured shades, an extension shade for the object glass, a sighting telescope, a brass screw top box, and two caps for the telescope.