1965 1-cent Proof Like Matte and Mirror finished ?

That hanger looks great, comes out clear and strong by far the best one I've had the chance of seeing there are a few in my own collection. Thanks for letting me know that the PLs are not immune from these errors!

One of the interesting things is that none of the 1965 matte have the large bead variety (all of them are small beads).

Also, a couple of 65's, still in plastic, have a struck through thread feature on the obverse. That's probably not so unusual given the high number produced.

I have examples of each, in ultra heavy cameo. I think this is worthy of a look under the SEM, to see if the texture is primary (i.e., imparted on the strike) or secondary (e.g., rabid squirrel pee).

@Ugly, True, it's not that easy to see those particle like things on the coins under normal light source ( like sunlight at daytime ) and under naked eye. It's also not that easy to take those pictures. But under the bulb light and tilt the coin some angle and use the 10x loupe, you'll get clear details. Please feel free to check the pics of 1964 1-cent Pl one in my picasa web album, I think should be able easy to tell them.

For terminology of these kinds of coin, not sure yet. I used the "Matte" just to make the description easy. I agree it was not accurate. How about Matte Like Finished Error?

Agree with @Staircase, it seems like has something to do with the environmental issue before sealed in sets. But just guess, had to wait some professional inspection.

Thanks everyone!

Mint did experiment with ways to keep the coppers red.................lacquered?

That's good to know and puts the issue to rest. Thanks Scissel and 54 for the info.