Welcome to Grampa Mac's Insulator Emporium

This Price Guide is designed to be used in conjunction with INSULATORS - A History and Guide to North American Glass Pintype Insulators
Enter the CD Number (Consolidated Design number system), Primary Embossing and Base (see below) and click "Continue"
CD
Primary Embossing
Base


CD: Listings are sequenced by CD Number (the Consolidated Design numbering system developed by Mr. N. R. Woodward to designate style and general use of the insulator. PRIMARY EMBOSSING: This generally refers to a name that is embossed on the insulator. It is usually either the company that manufactured the insulator or the company for whom it was made. Base: SB - Smooth base RDP - Round drip points SDP - Sharp drip points ...