These are 1960s US made glass vacuum resistors designed for aerospace missions. They are TI resistors sent to the Philco Aeronutronic division used to design space communications in conjunction with the Jet Propulsion Laboratory. You will receive the 25 resistors shown that still test within 1%. They are on the sheet shown. The full box is not included but can be available on request. These came from NASA surplus in the 1970s. Ford Philco Aeronutronics division designed the Houston Space Center communications used to communicate with the moon landing astronauts.