|Hard to find Pre-War item from the 1910's to 1920's. 21v bulb listed as #48. Bulb comes in a wooden cylindrical container with wooden lid measuring 1 and three quarters of an inch in height. The bulb itself is standard, but the containers aren't easy to find now, a century later! This example is missing the bulb but the container is in Very Good (C6) or better condition.