any comments on this? is this MD?? I dont even know error coins are not my thing.. any input would be awesome! thanks in advance - shawn A.K.A. "The Hammer"
It doesn't appear to be either machine doubing or die deterioation doubling. The extra elements appear to take the form of a shadow. If so, this is probably a surface film effect, either surface film doubling or surface film transfer. If a planchet or a die is a little oily or grimy, these effects can develop.
Surface film doubling occurs when an oily planchet (or a planchet struck by an oily die) expands during the strike. The area first touched by the die escapes to the side as the downstroke progresses, leaving behind a track. This usually has higher reflectivity than the surrounding metal and appears dark in photos. Usually the outline is vague, unlike the sharp outline seen here. Surface film doubling is best seen in coins struck out-of-collar (broadstrikes and off-center strikes), but subtle manifestations can occasionally be picked up in coins struck in-collar. Surface film transfer is more complex. If an oily planchet is struck once, shifts position, and is struck again, an oily image of the first strike is transferred to the field of the die. This is then transferred to the next coin that is struck as a shadow image. Surface film transfer tends to be sharper, like what we see in this Canadian dime. So if I had to guess, I'd go with this hypothesis. I've only seen two examples in U.S. coins, but it has been experimentally duplicated in coins struck in private mints. Ken Potter calls it "contaminated die doubling".
ok so... what it comes down to is, the coin struck right before this one was a DD? Is there any premium for these?? err I guess there wouldnt be if its just left over... grease and stuff
Not a doubled die. Double-struck. There is a premium for dramatic examples of surface film transfer. Even a modest case like this would certainly be worth more than a normal Canadian dime. I'd certainly be willing to pay $5.
