Brochure for the Gaumont-Kalee '140' rectifier, an electronic appliance controlling arc lamps particularly used for widescreen projection formats such as cinemascope or VistaVision. Undated but probably from the 1950s.
| Item number | 31876 |
|---|---|
| Category | Catalogue |
| Type | Technical |
| Language | English |
| Country of origin | UK |