Body, mater, rule, alidade, horse and tympan. Typical Arsenius type rete with interlocking and overlapping strapwork. 47 star markers (42 named). Sliding cursor and brachiolus of regula missing. Labeled in Latin and German.
Inscription/Sig.
"Gualterus Arscenius Louanij faciebat 1556" on right side of rule. "Tentanda via est Don Luis Delacerda" on left side of rule.
