Proof 1971 Panama Pure. 900 Silver Balboa, Actual U. San Francisco Proof minted for Panama with a mintage of less than 10,000. An incredibly rare well struck coin. This coin has a very high quality even for the proof strike that it is. An awesome coin and a smart investment. Exquisite RARE Panama Proof Very low mintage. A rare piece that will continue to rise in value. Quite a few other nice coins for sale if you want to check them out our other coins! . We appreciate your understanding beforehand.