- Have just found a Connecticut Quarter that seems to have a filled
collar die error. Reeding is very small. I have read that filled die
errors are somewhat common. Remainder of coin seems to be as it
should. Is this type of filled die error common?
- Filled collar errors are actually very rare, although weak reeding
isn't. Weak reeding may be due to a slightly weak strike, a little
bit of die tilt, or for reasons that aren't readily apparent.
Filled collar errors are uncommon because any crud that gets lodged
in the ridges on the working face of the collar tends to be pushed
out every time a tightly fitting, newly struck coin is ejected.
A true filled collar error will have the following characteristics:
1. The diameter of the coin will be smaller than normal when measured
between where the reeding is weak and the opposite pole. That's
because the crud will be even with the tips of the ridges on the
working face of the collar, which is equivalent to the floor of the
grooves on the coin. The diameter would be similar to a coin in
which the reeding in one spot was ground off to the level of the
floor of the grooves. So that would shave off a significant fraction
of a millimeter.
2. The rim should be very strongly struck -- or even finned -- next
to where the reeding is weak. That's because the metal is prevented
from expanding laterally during the strike. It has nowhere to go
except up into the rim gutter.
3. The weak or absent reeding should come to a relatively abrupt stop
where it meets normal reeding. If there is a gradual fade-out of
reeding then it's probably not a filled collar.
I actually don't have a single bona fide example of a filled collar
in my collection. I have lots of examples of weak or absent reeding,
but they owe their existence to other causes -- some known and some
-- Mike Diamond
--- In firstname.lastname@example.org, "corkysr"
> Have just found a Connecticut Quarter that seems to have a filleddie
> collar die error. Reeding is very small. I have read that filled
> errors are somewhat common. Remainder of coin seems to be as it
> should. Is this type of filled die error common?