original c. 1950's vintage american made single-sided industrial cautionary "authorized personnel only" factory sign designed and fabricated by the stonehouse steel sign company, denver, co. the die cut steel sign was salvaged from the a. finkl & sons foundry prior to demolition. the industrial sign reads "notice" at the top against a blue block of color and "unauthorized / persons / keep out" in black lettering below. the weathered and worn informational sign contains four pre-drilled holes for mounting flush against a wall.