JAJ were the producers of PYREX bowls and bakeware in England from 1922 until the plant (in Sunderland, UK) closed in 2007. Items were back-stamped JAJ (short for James A Jobling) until the mid-1970s, which is when Corning purchased the company and items started production with the PYREX ENGLAND back-stamp.
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THIS LISTING:
JAJ PYREX 'Chelsea'
#542 Oblong Casserole
Produced from 1968
Great vintage condition with only the smallest amount of surface wear. No chips, cracks or dishwasher damage (DWD).