These are all from the late 1960's and early 1970's. They include Hill and Pickett's "An Insulator Book for Collectors with Sketches and Prices" from 1968 with crude hand-drawn insulator profiles; Tibbetts' "A Guide for Insulator Collectors With Prices" (Fourth Printing) along with Volume 2 (Third Printing) and Volume 3 (First Printing) all from 1969 also with hand-drawn insulator diagrams; Milholland's "Most About Glass Insulators . . .," Third Revision, from 1975 mostly with b&w photos; Milholland's "Glass Insulator Reference Book No.2" from 1969 also mostly with photos; and Milholland's "Suggested Insulator Price Lists" from 1974, 1975, and 1976 with no pics. All are in good shape with no tears or missing pages that I can see. Add these nine classics to your insulator library for just $25 shipped in US. Will assist elsewhere.