- 2005.005.4.018
- Item
- [ca. 1960]
Item is a selenium match-needle reflectance light meter and original brown leather case.
Showing 3 results
Archival description- 2005.005.4.010
- Item
- [ca. 1960]
Item is a reflected and incident light meter powered by selenium photo cell.
- 2005.005.4.009
- Item
- 1968
Item is a reflected light and incident light meter with diffuser; powered by 2 Mallory MN 625 G mercury cells.