High-Value BOLOs Remain Strong but Need Sold-Price, Condition, and Authentication Validation

A vintage Pyrex flying-ducks casserole is described with tan-and-brown decals and an original clear lid, but the quoted $1,000–$1,500 estimate is not verified by completed sales. Jewelry marks, magnets, and informal Bakelite tests are only clues; costly pieces need careful, non-destructive inspection and professional verification.