Acorn Archimedes podule spacer (for early A300/A440/R140 machines only)

Early Archimedes had the podule socket in the wrong place on the motherboard, such that the backplane ended up too close to the rear of the machine. Acorn's recommended way of resolving this was to use small metal spacers to shim the back of the podules out of the back of the machine. Acorn supplied two of these parts in steel. They're a pain to fit, but make all the difference for these early machines.