Long mahogany strip brass pin gauge with five pins
1758-1769
1758-1769
1758-1769
1758-1769
1760-1770
1758-1773
1762
1752
1762
1762
1778
1762
1769
1755
2000-100 BCE
1761
1761
1776
1757
1762
1762
1762
1752
1752
1762
1755
1778
1764
1762
1762
1770
1776-1780
1776-1780
1776-1780
1755
circa 1780
1758-1769
1990-96
1770
1760-1772
1752
1758-1773
1775
before 1753
1752
1752
1751
1752
1755-1765
1752
1752