Circular electric light switch made of phenol formaldehyde
- Made:
- 1920-1939 in United States
Circular electric light switch made of phenol formaldehyde, unsigned, United States, 1920-1939. Object is marked on back with UND. LAB. INSP.
Details
- Category:
- Plastics and Modern Materials
- Object Number:
- 2005-346
- Materials:
- phenol formaldehyde (unspecified), steel (metal) and brass (copper, zinc alloy)
- Measurements:
-
overall: 45 mm 105 mm, 0.077kg
- type:
- light switch
- credit:
- Frangenberg, Tomas
