The 'Lieutenant' and one other are shown with incorrect insignia. The stripes are from no known US military service, and a 'Lieutenant' would not wear stripes. In the US military, collar insignia is used for enlisted personnel to identify branch assignment and/or function and for an officer's rank and/or Branch.
Dr. Helm refers to the items Dr. Stanford has as having been "...buried by Sumerian priests a thousand years ago..." Those would have to be pretty old priests: Sumer was absorbed into and succeeded by the Babylonian Empire around 1700 BCE, over 3700 years ago.