Brass worksplate, Manning Wardle & Co
1920
1920
1924
1925
1925
1925
1922
1923
1924
1922-1923
1922-1923
1922-1923
1922-1923
circa 1920
1920
1955; 1830
1921
1921
1924
1923
1920-1925
1919
1920-1925
circa 1920
2000-100 BCE
1923
1934
1920
1920
1925
1990-96
1920
1924
1920
1930 (replica); 1834 (original)
1801-1892 (prepared); 1946 (element replaced)
1919
1922
1923
1923
circa 1919
1922-1923
1922-1923
1922-1923
1922-1923
1922-1923
1922-1923
1922
1903 (original); 1982 (model)
1772 (original); 1919 (model)
1830 (original); 1967 (model)