1967 Silver Dollar Obverse Legends L And N Issues

I have noticed a number of markers on 1967 PL and SP as
well as MS strikes. The serifs on the obverse legends are
irregular. I have six 1967 dollars of different grades.
Three are graded by ICCS and three are not. Most show
doubling, they all exhibit a strange hitch in the end of
the L in ELIZABETH and the N in REGINA is noted to have a
wavy serif on the top right, and a thin left leg, as well
as a irregular serif on the bottom left of the N. Check
out the photos, they are pretty consistent across all
strikes. I have no access to a camera until tonight so
they will have to do for now.



PL Ungraded



Uncirculated MS Strike Ungraded



Graded SP-65



Graded PL-65



PL-64 Graded



Specimen Set



So they have varying degrees of distortion, the doubling
is most pronounced on the PL dollars. The irregular
serifs are on most dollars, so I can't say if it is a
minor DDO or not. Can anyone chime in on this, the
doubling on the L in the PL was identified previously as
Machine Doubling. Thanks in advance for any and all
comments. If all '67 dollars exhibit this, is it special?