For those with a greater interest in these errors...
1. These rolled-in wire errors have appeared since at least 1970 in
dimes, quarters, and halves and continue to the present day.
2. These have been identified as springs by some, but there is no
convincing evidence to support that conjecture.
3. The wires are evidently composed of steel, as they're strongly
attracted to a magnet.
4. The typical color for these wires is black. I've only seen one that
shows a lighter color.
5. The shape is always sinuous.
6. We know they're rolled into the strip rather than struck into the
planchet because the clad layer has split, revealing the copper core.
As the wire is rolled in, it splits the clad layer. Continued rolling
further enlarges the gap. Struck-in wires would not be expected to
split the clad layer. If any did, there would be no opportunity and no
process that would allow the gap to widen.
7. Length varies. The longest I've seen is over an inch long. The
wire is evidently quite brittle, and usually breaks into shorter
segments before landing on the strip.
If any visitors to the rolling mill have any additional information on
this subject, please weigh in.
Jerry's coin is the first proof I've seen with a rolled-in wire.
--- In firstname.lastname@example.org
> I just posted a pic of an error in the struck thru album. Its an
> Oregon proof quarter in a set that has a rolled in peice of wire.
> Having a beauty of a Mint state rolled in Maryland was great but I
> could'nt believe my eyes when I saw the proof version.Would love to
> know if anybody else ever discovered this type of error. Enjoy Jerry