Span classnews_dt03032016spannbsp018332this video describes the different tang stamps used by case cutlery to date and code their knives any questions or comments please feel free to share be.
In 2000 case introduced a new tang date stamp five xs and five dots from 2001 through 2005 one dot is removed each year from 2006 through 2009 an x is removed each year.
Beginning in 1990 case replaced the dating system with a stamp that imprinted the actual date on the knife tang this was not as popular with collectors so case changed back to the dot dating system in the middle of 1993 1993 1999 from the middle of 1993 to 1999 case returned to the dot system that was used in the 70s and 80s.
By learning the simple case dating system you can easily determine the year a case knife was manufactured in 1970 case added dots beneath the usa on the tangs of all knives as each new year passed one dot was removed so nine dots appeared in 1971 eight in 1972 and so on.
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Span classnews_dt26122013spannbsp018332this video actually took me quite some time to put together this is for dating your case xx pocket knives this information is readily available on wr.