This clear glass insulator is marked: Armstrong DP1 / Made in USA / 83-49. In good + condition it measures 4 inches tall and 3 1/2 inches wide. Highly collectible as an Insulator or it can be used as a paperweight. An addition to any Vintage Insulator Collection. SH & Ins. will be quoted after orders placed. If you have questions contact me and thank you for looking.