CD 110.5 National Insulator Co. EIN 010 - Beautiful light aqua with segmented threads. VNM condition. Small chip on dome edge and a tiny pencil-point nick on the lower wire-guide. Great piece. Purchased at 2017 National for $80 as a gift…but my daughter found a different piece she'd rather have. If I didn't already own one myself I would keep this beauty. For sale now for $80 plus shipping (mint versions were selling at the National for twice as much). Multiple pieces in box would reduce overall shipping.