License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Jacques de Gheyn II. A soldier on guard shaping the match between his thumb and his forefinger, from the Marksmen series, plate 41, in "Wapenhandelinghe van Roers Musquetten Ende Spiessen" (The Exercise of Arms). The Metropolitan Museum of Art.