I aquired this insulator a long time ago when I first started collecting insulators. Would love to learn anything about it, preferably the CD and type (pennycuick, no embossing canada, etc.) Thanks in advance to anyone who can lend a hand!

Update: This is a CD 134 Pennycuick. Its giveaway features would be the nice straight skirt and slightly larger wire groove. Much thanks to Mr. Burger for this info!