On Mahler’s death, Merz continued the business with his sons, Sigmund & Ludwig. After 1858, the firm was known as G&S Merz and was one of the most renowned German makers of microscopes and optical and astronomical instruments.
Hatchwell Antiques in Kings Road, Chelsea, is offering a 3-inch brass and mahogany refracting telescope by G&S Merz of Munich, c.1865, for £7500.
On a brass and steel tripod stand with equatorial mount, it features an objective lens signed G&S Merz München. It comes with a box containing oculars and other accessories bearing a brass label: G. & S. MERZ OPTISCHES INSTITUT vorm. UTZSCHNEIDER & FRAUNHOFER MÜNCHEN.
Hatchwell also sells via the fleaglass.com website.