This cobalt blue Milk of Magnesia bottle is from the 1950's. The bottle is marked: X BOND36 / M / DESIGN PAT. / 87178. It is in very good condition with no chips or cracks but has a few minor scratches. The bottle measures 5 1/2 inches by 2 1/2 inches x 1 inch. A wonderful addition to any Cobalt Glass Collection. SH & Ins. will be quoted after orders placed. If you have any questions contact me and thank you for looking.