Sello YER
Sello YER advertisements illustrated by Enrique Gil Guerra under the pen name "Nike"; the archive holds 4 pieces.
c. 1917–1940s (advertising documented 1917–1934; variants in metal and Bakelite boxes)
Sello Instantáneo Yer was one of the main proprietary medicines of Laboratorios Yer of Madrid, a company founded by Emilio Rey Sánchez, with Luciano Rey Romero as technical director. The product came in small lithographed metal tins and in Bakelite versions, and was advertised as early as 1917 in Spanish publications, with insertions documented in magazines of the period and a 1934 advertising poster that proclaimed it “el mejor preparado del mundo” (“the best preparation in the world”). In parallel, Laboratorios Yer marketed a family of over-the-counter preparations —Purgante Yer, Sello Instantáneo Yer and Hemorroidol Yer— widely advertised in the Spanish press of the 1930s and 1940s. The retail price was marked on the packaging itself, with variants from 0.40 pesetas.
Sources: Sello Instantáneo YER — «quita el dolor, el mejor preparado del mundo», hoja publicitaria 1934 — TodocoleccionAntigua cajita Sello Instantáneo YER — TodocoleccionPURGANTE YER | PHARMAKOTEKA — Universitat de Barcelona (ficha de Laboratorios Yer, Madrid)
