Decahedral glass object containing a diaphragm attached to a cylindrical piece of glass

Decahedral glass object containing a diaphragm attached to a

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Decahedral glass object containing a diaphragm attached to a
Science Museum Group
© The Board of Trustees of the Science Museum

Decahedral glass object containing a diaphragm attached to a cylindrical piece of glass, with base made of phenol formaldehyde and a knob made of phenol formaldehyde on top, with "ARGIT" Bte S.G.D.G. and Made in France inside the base, 1920-1940

Details

Category:
Plastics and Modern Materials
Object Number:
2005-338
Materials:
phenol formaldehyde (unspecified), glass and felt
Measurements:
: 5.5118 x 2.4803 in.; 140 x 63 mm
type:
unknown object
credit:
Frangenberg, Tomas