![](https://coimages.sciencemuseumgroup.org.uk/28/217/large_thumbnail_1992_0837__0004_.jpg)
Set of six targets with backing plates
![Set of six targets with backing plates, plummets](https://coimages.sciencemuseumgroup.org.uk/353/208/medium_smg00174556.jpg)
Set of six targets with backing plates, plummets, and tribrach clamp in sturdy carrying case, by Cooke, Troughton & Simms, circa 1960
Set of six targets with backing plates, plummets, and tribrach clamp in sturdy carrying case, by Cooke, Troughton & Simms, circa 1960