I posted this last week hoping to hear from some of you that may have some insight about this unusual edge. https://www.cointalk.com/threads/unusual-reeded-edge.299323/ Since then I've found another specimen so I'll try again, sorry if I'm being redundant. The subject coin is on the right in the 1st 2 photos, in comparison to another normal coin. Both finds are the correct diameter.
I am not too sure if this fits or not, but the definition sounds pretty close. http://www.error-ref.com/low-narrow-reeds-caused-by-truncation-of-ridges-o/
I came across the same website while trying to research this and at first I thought it sounded close too. However, the reeds on that coin were the result of the working face of the collar being ground down. They are well defined individual reeds, just shorter with wider and flatter valleys. This coin has numerous lines or steps on the reeds and valleys
I see nothing that would be of any interest to me since "reeding" errors/anomolies are simply not attended in the variety coin market.
I'm not aware of any market for, or reference to attribute reeding errors either. In fact it's hard to find much mention of them at all, which is why I put it out here again after finding 2 similar coins. I don't think this is a 'strike-it-rich' coin but I'd love to learn what process was involved in this error, if I can call it that.
Interesting point. This issue is out of scope for me, but I've noted similar - if less complex - detailing in the reeding of 1921 Morgans.
Do you know how/why a new collar does this? The reeds also seem very shallow, and metal appears to have been pulled toward the reverse side leaving a saw-tooth like edge on parts of the reverse rim.