| Accession Number | P00603.015 |
|---|---|
| Collection type | Photograph |
| Object type | Black & white |
| Physical description | Black & white |
| Conflict |
Period 1950-1959 |
| Copyright |
Item copyright: Status to be assessed |
IONOSPHERE RECORDER. VENNER MOTOR DRIVING CAMERA, ONE FRAME PER MINUTE. CAMS OPERATE TRACE ...
Description
IONOSPHERE RECORDER. VENNER MOTOR DRIVING CAMERA, ONE FRAME PER MINUTE. CAMS OPERATE TRACE BRIGHTENING AND CLOCK FACE LIGHTING. PUSH BUTTON BOTTOM LEFT TO TRACE BRIGHTENING WHEN VIEWING THROUGH PEEPHOLE. ( ELECTRONIC INSTRUMENT )