The original serial number 6'510'974 identifies a wristwatch in stainless steel bearing the reference 5223 and the order number 22344. It is fitted with a Longines manually wound mechanical movement, caliber 12.68N (also called 12LN in the USA). It was invoiced on 22 April 1943 to the company Longines–Wittnauer Company, INC., which was at that time our agent for the USA.
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