Twelve-inch quadrant by John Bird
1760-1769
Astronomical quadrant with stand, 1685-1724
1685-1724
Twelve-inch quadrant by John Bird, with case
1760-1769
Brass quadrant by Peter and John Dollond, 18 inch radius with optical sights on tripod
1780-1820
Twelve inch astronomical quadrant by Bird
1760-1769
Brass quadrant with stand and case.
1771
Brass quadrant of 18-inch radius on a tripod stand
1780-1820
Brass quadrant of 18-inch radius on a tripod stand
1780-1820
Brass quadrant
1749-1783