@watchguy23, if you didn't already know, an extract is a document from Omega. Based on the serial number, the document will tell you what reference the movement was in when it left the factory as well as where it was sold (country location.) Sometimes there is additional information, such as the dial). It costs $150 and can be a valuable piece of authenticity. But it's just one piece in a long chain of evidence. It may or may not help in this case, as the whole purchased originally bY NASA might be outside their norms. No idea.
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