Size 178mm(7”), Internal focusing with vertical circle graduated ot read 30 minutes with Vernier extendable base plat, extendable to 375mm (15”). The spirit levels mounted on the top of the telescope and circular bubble on the straight edge, The telescope is fitted with pull out glass stadia diaphragm. The vertical are fully divided is half degree divided giving angles of elevation and depression readable by magnifiers. The instrument is supplied in teak wooden box complete with all accessories.