E39 introduces an extraordinary example of engineering creativity from the ancient world. Its design demonstrated an early approach to automated transactions. The weight of the coin temporarily activated a lever https://pocketcasts.com/podcast/huy-hoang-podcast/1eef9730-8383-013f-f21c-0affd341b2cf/e39life/014841df-e3f5-4184-8909-637505cddd76?hl=it