9 of the Rarest Pyrex Patterns – I’ve Never Seen Some of These!

3) Blue Spirograph Casserole Dish

This limited 1969 run uniquely has a two-tone spirograph design on both sides of the lid, while the actual casserole dish itself is simply blue. This set came with a melamine trivet plate to put underneath, but these are often long gone by the time one of the spirograph casserole dishes get to auction these days. These can sell for between $50 and $150in today’s market!