Neil Armstrong's LM PPK contained a piece of Wooden through the Wright brothers' 1903 Wright Flyer's still left propeller as well as a piece of cloth from its wing,[eighty one] along with a diamond-studded astronaut pin originally presented to Slayton by the widows of the Apollo 1 crew. Aldrin https://ambiq.com/events/apollo-series-mcu-hardware-design-guide/