Elliptical Coins

G'day, it will assist if you can add pics - both sides - to your query. And include a scale, please.
Peter in Oz

The way it has been explained to me in the past. An elliptical coin is type of clipped coin error. It can happen when a blank is punched out in the strip but does not fall thru and gets punched again off center. This creates the elliptical clip and the crescent clip. But I was told that most of the elliptical clips we find were created when a blank is an incomplete punch error which means a punch partially went thru the strip then the strip advances forward and the punch then stamps out a blank with a curved line from the incomplete punch still in the blank. Next the blank gets the rim applied creating the planchet. Then the planchet gets stamped by the dies and the force of the strike can cause the coin to break apart at the incomplete punch seam. This creates the elliptical clip and the crescent clip. The difference between the two is the first possibility will create a clip without a rim and the strike will probably not be centered. The second and most common possibility will create a clip with a rim and the coin looks centered if all of the coin were there. You would look for counterfeit just like you would for any other clip. This is kind of wordy but I hope it helps.

Sounds like an eliptical clip that broke apart during the striking process. I'll watch for the photos.