Here's an unusual item... In the '60s and early '70s, stainless steel plaques were made and attached to the ladders on Apollo lunar landers. They were left permanently on the Moon, on the landers' descent stages. My Grandfather knew the man that did the original engraving for the Apollo 11 plaque. He made, from the original, a number of acid etchings, like circuit boards.
This is one of them. It is a thin piece of plastic with the details of the plaque, in copper. It is made from the same reverse engraving as the actual plaque, left on the Moon in 1969.
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