This image displays an authentic vintage countertop master box for Rentz Spark Plugs, manufactured by the Rentz Spark Plug Co., Inc. based in Atlanta, Georgia. [1]Historical OverviewEra: These specific packages date back to the 1920s. They are highly popular artifacts among antique automobile, motorcycle, and hit-and-miss stationary engine collectors. [1, 2, 3, 4]Packaging Details: This yellow and orange exterior carton served as the master shipping box sent directly from the factory. It originally held a set of 10 individual, smaller plug boxes. [1, 2]Design Features: The illustration on the front features their signature intensified/visible spark plug design. This engineering style featured an adjustable center pin or an extra side electrode mechanism. It acted as a "spark intensifier," helping operators visually verify that electrical current was actively reaching the plug measures 3 in x 7 in x 4 in

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