Colorful ORIGINAL EMBOSSED vintage SQ Spartan Quality Feeds ADVERTISING SIGN. FEATURED: colorful ORIGINAL EMBOSSED vintage SQ Spartan Quality Feeds ADVERTISING SIGN! Measures about 14″ across x 18″ tall. Front has: SQ / SPARTAN QUALITY / FEEDS. Online research indicated the sign dates from the 1940’s-1950’s. Was owned by Purina Mills Inc. The Spartan Feed & Grain Co. Plant was located at Spartanburg-Newberry, S. The Plant was closed in 1991. CONDITION: This colorful ORIGINAL EMBOSSED vintage SQ Spartan Quality Feeds ADVERTISING SIGN has: some wear, small bend-over top right corner, some paint loss/rust at the bottom front & back, and soiling. PLEASE SEE ALL PHOTOS! Auctiva offers Free Image Hosting and Editing. Auctiva gets you noticed! Track Page Views With.