![](https://coimages.sciencemuseumgroup.org.uk/499/503/large_thumbnail_smg00269745.jpg)
Metal, trial frames
1900-1930
1900-1930
1900-1940
1950-1960
1970-1980
1851-1910
1900-1940
1900-1914
1900-1930
1900-1940
1900-1940
1900-1940
1900-1914
1900-1914
1891-1930
1900-1930
1900-1930
1851-1910
1851-1910
1891-1910
1891-1910
1851-1910
1900-1914
1900-1940
1900-1940
1900-1940
1900-1920
1914-1934
1935-1945
1901-1930