1968 Grover « Permaseal » Piston Ring Company Engineering Brochure Signed Letter

Here we have up for sale an ORIGINAL 1968 Grover Piston Ring Company « Permaseal » piston rings sales brochure. This brochure has super illustrations as well as having in-depth information about the piston rings that Grover was making back in the day (please see pics). Also included a neat hand signed letter. This set is in very good shape with NO tears or tatters. Brochure contain clean pages and is in VERY GOOD++ overall condition. Thanks for viewing………….Triple K