The barrel and five draw tubes of this non-achromatic telescope are made of paper. These allow the telescope to open to a length of about 2m. The other fittings are of turned wood. The initials M.R. and a star motif are stamped on the barrel. These probably refer to Christian Mur and Johann Sterr, optical instrument makers from Freising, since the same motifs appear on other instruments known to have been made by them. There is also a handwritten inscription on the second and third draw tubes: 'Ao. 1645-6 M.R.' This was previously thought to be the date of the telescope.