Help - Strike clips

[Maxorin]

Can anyone give me a tip to where I can find a detailed description on
how Strike Clips occur? Have read a couple of things about it, but dont
think what I read was accurate. Am i little unsure.

[diamond]

I've written two articles in Errorscope on them, although I'd have to dig them out to give you the exact reference. In general, a strike clip occurs when a coin is sheared or torn apart during a strike. There are several ways this can happen.

1. An off-center planchet can get trapped between the hammer die and a collar frozen in the "up" position. The planchet is sheared in two, producing a strike-clipped planchet and an elliptical strike clip cent. The same event can involve an already-struck coin.

2. An off-center planchet or coin can have the "dangling" portion pinched off during a uniface strike, if the miniminum die clearance is close to zero and/or striking pressure is unusually high.

3. If a saddle strike fails to buckle, one of the two tandem off-center strikes will be driven beneath the unstruck middle portion as it expands. The stresses can cause this off-center strike to be torn off.

There may be one or two other scenarios that I'm forgetting about.

Here's an elliptical strike clip:

http://cgi.ebay.com/1990-D-Lincoln-Cent-Elliptical-Strike-Clip-BU-Red_W0QQitemZ300178154872QQihZ020QQcategoryZ524QQr dZ1QQssPageNameZWD1VQQcmdZViewItem?_trksid=p1638.m 118

These are always mislabeled by the grading services (and most dealers) as elliptical clips. This dealer is a refreshing exception.

[Maxorin]

Ok, thank you very much.