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| Field name | Value |
|---|---|
| Reference | EXEBD 69358 |
| Title | Advertising card with chromatrope effect: Bovril |
| Date | n.d. |
| Document Type | Ephemera |
| Library/Archive | The Bill Douglas Cinema Museum |
| Notes | For a short video clip of this device in action see our virtual exhibition feature, Optical Delights. |
| Topics | optical toy, magic lantern, optical entertainment |
| Copyright | The Bill Douglas Cinema Museum |