Scale model (1:12) of the 27-inch refracting telescope

Scale model (1:12) of the 27-inch refracting telescope, at the Vienna Imperial Observatory, completed by Howard Grubb and Sons Limited in 1878.

The telescope was made by Grubb for the Vienna Observatory in 1880. It was the largest refractor in existence at that time. In 1894 Grubb made the 28-inch refractor for the Royal Observatory Greenwich. Other large refractors subsequently made were those at Lick (36-inch, 1888) and Yerkes (40-inch, 1897), both made by Alvan Clark. Sir Howard Grubb, Parsons & Co made a 41-inch refractor for Nikolaieff Observatory South Russia.