Ball
Square
Mason
Dates of
production:
Refer to the glossary
for definition of terms.
Notes:
These jars were made
from altered moulds obtained when Ball acquired Schram
Glass in 1925. They had previously said “Drey Square Mason.”
Quart jars have a carpenter’s square between the words ‘square’ and ‘mason.’ Pints do not have this, because of space limitations.