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<p>[QUOTE=&quot;Conder101, post: 2073335, member: 66&quot;]All dies were made and received their mintmark at Philadelphia until 1997.&nbsp; Since 1990 all the mintmarks have been in the master hub.&nbsp; Since 1997 Denver has made their own dies using a master hub provided from Philadelphia.&nbsp; Philadelphia still creates the dies for S and W issues.</p><p><br /></p><p>Typically the way an overmintmark would be created would be when Philadelphia found they had created more dies for a mint that that int needed they would be repunched with the other mints mark.&nbsp; This would be before the dies were hardened.&nbsp; There are a few exceptions.&nbsp; After the CC assay office closed the old Morgan reverse dies still on hand were returned to Philadelphia where they were annealed and repunched with O mintmarks.&nbsp; Thus the 1900 O/CC dollars.&nbsp; And some 1954 S nickel reverses were probably returned and repunched to create the 1955 D/S nickels.</p><p><br /></p><p>The branch mints did not have mintmarks punches.&nbsp; There is correspondence in the archives from the mints reporting times when they received dies lacking mintmarks requesting replacements and shipping the unmarked dies back.&nbsp; If they had had punches all of their dies would have been umarked and they would have simply added the mintmarks themselves.&nbsp; There would be no need for the correspondences.&nbsp; There are also examples where apparently the mint could not wait for replacements and proceeded to crudely cut a mintmark into the die and use it.&nbsp; Examples being the 1854 huge O quarter and most famously the 1870 S three dollar gold piece.[/QUOTE]</p><p><br /></p>

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