A Silesian mug and a cover with views of Hirschberg and Warmbrunn Warmbrunn, dated 1805

the faceted cylindrical form  engraved with the monogram MAST 1805, within a rococo scroll cartouche enclosed by a panoramic view of the Riesengebirge with titled views of Hirschberg and Warmbrunn, inscribed below Läst Gott der treüe Wümsch, in die Erfüllung gehen, So müß dein Wohl O! Freünd, gleich diesen Bergen stehen, with strap handle and slightly everted rosette-cut base, gilt-edged rim, the matched domed faceted cover with gilt band and gilt heightened faceted ball finial 

some wear to gilding
"In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. Since we are not professional conservators or restorers, we urge you to consult with a restorer or conservator of your choice who will be better able to provide a detailed, professional report. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby's is merely a subjective, qualified opinion. Prospective buyers should also refer to any Important Notices regarding this sale, which are printed in the Sale Catalogue.
NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING A LOT, ALL LOTS ARE OFFERED AND SOLD AS IS" IN ACCORDANCE WITH THE CONDITIONS OF BUSINESS PRINTED IN THE SALE CATALOGUE."

Compare with Dietmar Zoedler, Schlesisches Glas - Schlesische Gläser, p.135.