Andreas Naeplaesnigg, ‘Natural Trumpet in D’, 1790, The Metropolitan Museum of Art

Jettingen, Germany; H. (perpendicular to bell): 26 7/16 in. (67.2 cm); Diam. (of bell): 4 5/8 in. (11.7 cm)
http://www.metmuseum.org/art/collection/search/501675

Image rights: The Metropolitan Museum of Art (The Crosby Brown Collection of Musical Instruments, 1889), licensed under CC0 1.0 Universal

About Andreas Naeplaesnigg

German, active 1790, Jettingen, Germany