The Ontonagon Valley Coop.

m-1

capacity: half pint
color: colorless
top: common sense
maker's mark: I-circle mark

(heel)
other marks: SEALED / HALF PINT LIQUID / REG. (heel)
date: 1950s
rarity: common

m-2

capacity: half gallon
color: colorless
top: later common sense
maker's mark: I-circle mark

(heel)
other marks: REGISTERED / LIQUID HALF GALLON (heel), Duraglas (base)
dated: 1958
rarity: common

m-3

capacity: half pint
color: colorless
top: common sense
maker's mark:

(heel)
other marks: REG. / HALF PINT LIQUID / SEALED (heel)
date: 1950s
rarity: common

m-4

capacity: half gallon
color: colorless
top: Econopor finish
maker's mark:

(heel)
other marks: REG. / SEALED / HALF GALLON (heel)
date: 1950s-1960s
rarity: common

Bruce Crossing, Mich.