The dot isn't a date stamp on the 500 series model. Joe Housers history on them says that that a blade with one or more dots in the tang stamp means that the blade was fine stamped instead of conventionally blanked and that change took place sometime in the 80's, probably '84 or '85.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.