Lampor för fotografiskt mörkrum, för fotogen, med lampglas av rubinfärgat glas. Ur Bäckströmssamlingen.

English: Kerosene lamp in red glass for photographic darkroom. Marked: "Massiv, rubin, beste Qualitet 10". The lamp belonged to customs officer K. E. Stenquist 1880-1896.
Purchased by Helmer Bäckström and donated by him to the museum in January 1939.
Kerosene lamp for photographic darkroom work. The glass is made of ruby glass. The lamp is marked "Inactin Massivrubin spektroskopisch geprüft 10". Purchased by Helmer Bäckström at Forsners A/B in Stockholm 1935. Donated by Bäckström to the museum in January 1939.
Kerosene lamp in red glass for photographic darkroom. Purchased by Helmer Bäckström at Forsners A/B, Stockholm, 1935. Donated by him to the museum in January 1939.