Rare - Large Bosch Spark Plug Enamel Advertising Sign Robert Bosch GmbH, commonly known as Bosch, is a German multinational engineering and technology company headquartered in Gerlingen, Germany. The company was founded by Robert Bosch in Stuttgart in 1886. Designed for point-of-sale advertising. This sign would have originally been displayed in a Motor Parts Shop. We Estimate the sign to be from around the Late 20th Century period. This Large advertising sign is Approximately 60 cm high x 40 Cm Wide. The Sign is made from heavy metal enamel and weighs approx 2.6 Kg's. It's in good used condition for the age, with a few light enamel nibbles as expected with a used dealer sign. Ideal for all Automobile Enthusiasts. This sign will be carefully packaged and delivered via courier service.