Scanned from a large collection of engravings I recently acquired mostly from 3rd edition (1788–1797) and 4th edition (1801-1810) of the Encyclopedia Britannica
Titled: Herschel's Great Telescope
The telescope was built between 1785 and 1789, it was dismantled in 1840 as the structure was becoming unsafe
Engraved by Andrew Bell (1726–1809)