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Thank you for checking out our store! We value every customer and want you to be happy with your purchase. Up for sale is a signed collectible 8x10 photograph of Gladys West, professionally authenticated by PSA/DNA. Gladys West is an American mathematician whose pioneering work on satellite geodesy helped lay the foundation for modern GPS technology. This signed and authenticated 8x10 photograph is a great collectible for Gladys West admirers, science enthusiasts, and autograph collectors. The autograph has been professionally authenticated by PSA/DNA, giving you confidence that you are purchasing a genuine signed collectible. We’re happy to assist you anytime, so feel free to message us with any questions!