Very large brass sector, hinge engraved with floral pattern (same pattern that can be seen in sector illustrations in the third edition of Galileo's book on the sector). Engraved near hinge with "Jacobus Lusverg...anno 1687"
Date
1687
Manufacturer
Jacobus Lusverg
Place Manufactured
Italy
Dimensions
1 x 21 1/2 x 4 1/4 in.
Category
Pre-computer/sector
Subject
Proportional compass; Hand calculation; Military applications; Analog
