Just added an improved reproduction of the ivory carving by Angermair to the Trombone History Timeline (17th century–first half). I’ve also included the detail of the trombonist in the HubPages article on the Grip of the Early Trombone, bringing the total number of visual examples in that article to 44. Here’s the image and caption, below.

1618-1624—Christof Angermair’s ivory carving from the coin cabinet of Elizabeth of Lorraine depicts a number of musicians, including a trombonist in the foreground, performing with Pan, the shepherd’s god (see below image; public domain) (Munich: Bayerische Staatsgemäldesammlung; Salmen, Gartenmusik 75; Hindley 164).