During the early decades of the 20th century J Wiss offered electrotype letterpress blocks for free to dealers that would then use them to advertise locally. Most of these here come from a former printer in Western Pennsylvannia and date from the second half of the 1930s. There must have been a Wiss dealer there that advertised often. All of the below are in my collection, though these photos here are the seller's. Hover mouse over image for model name.