Steel Square Instruction Booklet Set ICS 1920

This is a nice, clean instruction book set Part 1 & 2, titled: "INTERNATIONAL CORRESPONDENCE SCHOOLS THE STEEL SQUARE 1066 A & B". Booklets showing various uses for a specific tool called a steel square, whether as a builder or craftsman, the steel square is still used to measure angles and all sort of shapes today.  Each is a paper back booklet, stapled binding in very good condition, only very light wear on the exterior, pages are clean with some very minor darkening around the outside edges of the pages mostly. 130+ pages, total in both booklet, loaded with excellent illustrations and text on the subject, measures 5.9 x 8.9". A very hard to find instruction book on the steel square, a first edition! These booklets have been stored inside a hardback storage cover over the years, the cover has protected them very well, so they are in very nice condition due to the care taken in storing them. The storage covers are not included as each cover holds about 12 booklets or which I have listed for sale individually at this internet store.