Hello All...does This1969-D Jefferson Look Like A Multiple Mint Mark?

Just Die Deterioration called, " DDD ". Besides, after 1989 on nickels, the mint went to single squeeze die making and the mintmark was no longer placed upon the die by hand on the sets of working dies(plural) but was incorporated into the master design. Doinh this is what caused the different RPMs, after the change, essentially the RPM business ended.

I was wondering what year did they go to single squeezed die? Was is 1989 or earlier dates? Thank you

James Lackey, it was 1989 for nickels and 1990 for cents, the 1989D cent is last RPM as a hub introduced error.

The big misunderstanding comes in just how the dies were produced. Hubbing means multiple master hubs were used to form a final series of working dies. The final addition to the individual working die was the hand-punched mintmark. Sometimes necessary for a repunching of first mark, misaligned and rotated MM are caused this way. In 1989/1990 the process changed. All elements particularly mintmarks were placed on the one master die. Now some hub doubling has been noted, mostly distended hub doubling(fatter details) this is because in forming the master, older and newer were placed over one another. Technically, this is a doubled die, more specifically it is a design anomaly.