I was pleasantly surprised to find this West Side insulator at a Southern Maine flea market! It's a CD 303/310 EIN [010] (F-Skirt) HEMINGRAY/PATENT MAY 2ND 1893 (R-Skirt) MUNCIE TYPE {CD 310 sleeve is unembossed} RDP in Hemingray Blue. The CD 310 sleeve is about mint. The CD 303 Muncie has three outer base edge chips. The seller had no history of its origin. Awesome color, though!