Chromotrope mechanical lantern slide (broken)

Chromotrope mechanical lantern slide (broken), showing mechanism, no glass.

Details

Category:
Cinematography
Object Number:
1950-122
Materials:
wood (unidentified), mahogany (wood), steel (metal), brass (copper, zinc alloy) and metal (unknown)
Measurements:
whole: .11 kg
type:
lantern slide
credit:
The National Media Museum, Bradford