Two (2) Scientific Advertising Displays, Post and Keuffel & Esser. 1st item: Vintage Frederick Post Slide Rule Store Advertising Display. This rotating counter display measures 19" tall, and base measures 10 1/4" in diameter. Included are 8 slide rules, all attached by chains to the display. Rules include: 1) 10" Universal rule 1452W, 2) Versatrig 1450F, 3) Versalog 1460L, 4) 4" Pocket Rule 1441, 5) 5" Pocket Rule 1444K, 6) 5" Pocket Versalog 1461, 7) 8" Student Rule 1445, 8) 10" Student Rule 1447. 19" H x 10 1/4" dia. Circa 1960. 2nd item: Vintage K & E / Keuffel & Esser point of sale advertising sign, comprised of molded plastic and electrified for light, reading "Creative Products for the Creative Engineer, K & E". 14 3/4" H x 14 3/4" W. Provenance: Private West Tennessee Collection. CONDITION: 1st item: Overall very good condition. Minor wear to base. 2nd item: Crack to lower left corner, light not working, likely needs a new bulb. Electrical is intact. Minor rubbing to mid right logo margin.