Original vintage industrial magazine ad forPARKER-KALON CORPORATION of New York City, NY. Common Sense Assembly Engineering Solves a Minute Mystery, skips Tapping 9 Holes. Nine P-K Type Z Self Tapping Screws used in this Rex Cole Inc. Mystery. Old 1948 industry advertisement. Would display magnificently matted and framed!
Approximate size 8 x 11 inches.