Illinois Glass Company at Acton, Illinois 1873-1929. Greenfield Fruit Jar and Bottle Company, Greenfield, Indiana, 1890-1909. Sold to Ball in 1909 and resold in 1917. Dates given are the dates the companies were in operation and not necessarily when the jars were made. Perfect Mason were made.
Most jars are green as shown above.
They are a different green than Ball or other jars. I can tell a Boyd jar at a distance just by the unique green color. The jars produced in California are clear. A friend in California has a clear jar. Most Boyd canning jars, or fruit jars as they are commonly called, are relatively inexpensive as collector items.