Five wooden molecular model balls
circa 1810
circa 1810
1835-1845
1870-1900
1855-1865
1845-1855
1855-1865
circa 1830
circa 1820
1830
1861
1825
1855-1860
1855-1865
1875-1885
circa 1856
1835
1880-1900
1860
circa 1820
1900
1844
1845