Signed Pittsburgh Lamp with Green Cased Cracked Ice Lamp

Arts and Crafts or Mission style signed Pittsburgh Lamp Brass and Glass Compnay lamp base with a cracked ice or glue chip cased green glass over white shade. This has been rewired and the base has been converted from a gas base to electric. The shade has one tiny edge chip on the bottom edge but it doesn't really show. The shade measures 10" diameter and the total height is 16"