This jar on eBay came to us from Raymore, Missouri. It is a one pound Crystalvac in clear glass with a flat Ball embossed lid.
And like the one we found a few days ago, this one also has the “3 Rivers (Star)” imprint on the bottom.
Of the dozen Crystalvac jars we have only the small ones have Three Rivers marks. Were the large jars made later when Ball Glass had taken over Three Rivers?