The shades are the original Gas shades.
They have design details that mirror the design on the body,
the break and canopy of the chandelier.
The Gas Chandelier Period began in the 1850's and
followed the use of fluids (e.g. kerosene, oil)
to power chandeliers. Gas was manufactured from coal. This was
an improvement from a safety point of view because fluids would
tend to flow and drip to cause fire hazards.
A typical
gas chandelier (e.g. 3 arm gas chandelier) would
have 3 arms with bowl shades on the end of the arms
housing a gas flame that would light the room .
The wattage output from gas chandeliers was fairly
low.
Antique Gas fixtures can be placed in
many of the rooms in your home and vary in size and detail.