VTG Early 1900's Very Large 11 inch Cobalt Blue Edison Mazda Photography Bulb

Featured is a Vintage Cobalt Blue Edison Mazda Photography Bulb. The bulb is circa early 1900's. These were said to have been used to simulate daylight for photo shoots. It is approx 11 inches tall. I'm unable to test if it is still in working condition bc the metal Edison Screw is missing, but I'm going to assume not. It is sold as is to be used as decor, a prop, etc. Its really a beautiful piece of glass.