By the way, I can't say it often enough, but the term "die adjustment strike" is untenable. Unless you were there when the coin was struck, you can't identify the ultimate cause for a weak (low-pressure) strike. It could be an escapee from a test run (unlikely) or the result of mechanical failure (e.g., jam-up in adjacent striking chamber, broken knuckle joint, loss of proper die spacing, improperly positioned cam, etc, etc). The vast majority of weak strikes in the marketplace are undoubtedly the result of spontaneous equipment malfunction.
At best you can identify proximate cause (abnormally low ram pressure or insufficient die approximation), but this usually depends on the presence of at least one additional error.
Mike Diamond is an error coin writer and researcher. Views expressed here do not necessarily reflect those held by any organization I am a member of.
Harry779
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Lane
See http://www.doubledimes.com for a free online reference for US twenty-cent pieces
By the way, I can't say it often enough, but the term "die adjustment strike" is untenable. Unless you were there when the coin was struck, you can't identify the ultimate cause for a weak (low-pressure) strike. It could be an escapee from a test run (unlikely) or the result of mechanical failure (e.g., jam-up in adjacent striking chamber, broken knuckle joint, loss of proper die spacing, improperly positioned cam, etc, etc). The vast majority of weak strikes in the marketplace are undoubtedly the result of spontaneous equipment malfunction.
At best you can identify proximate cause (abnormally low ram pressure or insufficient die approximation), but this usually depends on the presence of at least one additional error.
Hoard the keys.