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Vintage Pyrex 228 9" Pie Plate - USA Borosilicate Glass - 1950s Circular Stamp
$35.00
$45.5
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Product Details
Description
Specifications
Care Guide
Vintage Pyrex 228 9 Pie Plate - USA Borosilicate Glass - 1950s Circular Stamp Product History & Authentication This piece is a classic example of mid-century American bakeware. You can verify its vintage status and material through several key markings: • Glass Type: This plate is made of borosilicate glass. Historically, vintage Pyrex (stamped in all capital letters PYREX) used this thermal-shock-resistant formula. This allows the dish to handle significant temperature changes better than modern soda-lime glass (pyrex in lowercase), which was adopted later in the U.S. for consumer goods. • The Logo (1950s): The circular backstamp configuration—with TRADE I 9-inch diameter. • D-15: These smaller alphanumeric codes usually refer to specific factory mold numbers or production runs rather than a date.
Daily Cleaning: Use a soft brush or damp cloth to gently wipe away dirt. Avoid harsh chemicals. For mesh areas, use diluted mild detergent and a soft brush.
Drying: Air dry in a cool, shaded place after cleaning. Avoid direct sunlight or high heat, which can cause fading and glue deterioration.
Storage: Stuff with paper to maintain shape when not in use. Store in a dry, ventilated area to prevent mold. Rotate between multiple pairs to extend lifespan.
Usage Notes: Designed for basketball. Not recommended for hiking, long-distance running, or other specialized sports where different performance features are required.