The reverse lines are solid, not a gas bubble. I have looked at different sites and cannot find one to compare it. What type of planchet error is this?
I disagree with it being feeder fingers. Due to being just one single line, I believe it was a scratched planchet. @Fred Weinberg, @paddyman98, @JCro57, others?
Anyone take notice of the lettering in E PLURIBUS UNUM... I can see the contrarian view, but there is a higher probability of feeder finger because of the uniformity and the parallel lines;a scrape of the finger could still allow for that one deeper line...in a scratched planchet, as proposed, you would expect a rim/edge entry point and none is visible...
I agree with @Pete Apple that it is from a feeder finger. Those lines are raised, meaning the actual die had to have incused scratches leaving the raised area on the planchet. Their perfectly linear appearance also suggests that as well.
Yeah was going to say. I get them often. I don’t even save to give away. Waste of time. It’s a zinc thing is what I call it