Left is a CD 168 embossed Hemingray Made in U.S.A. and on reverse skirt D-510 - See no flaws - $65 -- Right is a CD 234 embossed Pyrex T.M. Reg. U.S.A. Pat. Off. reverse skirt Made in U.S.A. - 63 - A - See no flaws - $50 plus shipping.