Very early and rare Pyrex jar, container bean pot. Please look at pictures for condition. Looks good for its age!! History of Pyrex 504: Early Production: The Pyrex 504, like other early Pyrex pieces, dates back to the early 20th century, specifically around 1919-1920. Material: These early clear glass Pyrex items, including the 504, were known for being made from borosilicate glass, which offered thermal shock resistance, making them suitable for oven use. Original Collection: The 504 was a component of Pyrex's initial line of ovenware, designed to be practical and durable for everyday cooking
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