Blank penny with no rim?

Greetings,

Google brought me here and I needed some opinions about a blank penny I came across. I was redeeming a bulk of change at my local coinstar machine and this kept popping out of the rejected coin return. I think it's a blank penny, but it's got no rim and it's a bit smaller than an actual circulated penny. I scanned both sides for your consideration. What do you guys think?

Thank you to all

 

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I am guessing it is a slug and not a coin blank/planchet.

Even if it were an unstruck cent, the weight should be the same and the size difference marginal, and thus should not be getting rejected. Can you weigh it on a gram scale?

Also strange that the top photo appears to have a rim, while the bottom does not.

My guess is that it is not a U.S. coin blank/planchet, and is either one for a foreign country or is a slug.

 

What does it weigh?

 

Thank you, I could try to go to a jeweler tomorrow to see what it weighs and report the findings later.

 

looks like a slug

 

The key is will be the weight. Until you have that, it's all speculation