RT-41 / 10156 - Reading Telescope: Simple form focusing from 1 meter to infinity. Ramsden eye piece with cross wire, achromatic optical equipment with rack and pinion arrangement, fitted on tripod base.
RT-41 / 10156 , RT-42 / 10157 , RT-43 / 10158
RT-43 / 10158 - Reading Telescope: Same as above with Up and Down motion. Complete with scale.