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Before people carried around cell phones in their pockets that automatically updated to the current time zone, airlines gave out convenient time converters to passengers on international flights. Part time converter, part distance list, and part advertisement, passengers could turn this card to figure out the time in their chosen destination. Have you been to any locations on this card? This image was posted on February 13, 2023.

This post mentions the following things involved with the SFO Museum collection:

TWA (Trans World Airlines). It is related to TWA (Trans World Airlines) (the company) .