![](https://coimages.sciencemuseumgroup.org.uk/357/151/medium_thumbnail_1954_0267__0003_.jpg)
Exgovernment inra-red detector
![Exgovernment inra-red detector, type 5c/3157](https://coimages.sciencemuseumgroup.org.uk/342/39/medium_smg00175912.jpg)
Exgovernment inra-red detector, type 5c/3157, comprises object glass, image converter cell and eyepiece mounted as one unit and includes H.T. lead, unused
Exgovernment inra-red detector, type 5c/3157, comprises object glass, image converter cell and eyepiece mounted as one unit and includes H.T. lead, unused