The product is a vintage Stromberg CD carburetter Zenith technical drawing from the 1970s, featuring a hessian-backed design. This detailed technical drawing would have been used by mechanics or enthusiasts looking to service or repair a Stromberg CD carburetter made by Zenith during that time period. The hessian backing adds a unique and authentic touch to the drawing, making it a valuable piece for collectors or those interested in classic car maintenance.