Badge "Excellent Border Guard".

[Dolf]

Gentlemen,

Can any of the Badges experts let me know what you think of this Badge?

Comparing it with a couple of pics of what I suppose to be an original piece I can see there are a few differences.

For example, on the obverse of this piece I'm posting, on that border tower there are 3 red parts and 2 of the same color of the background of that area.
On the other piece I believe to be authentic, there are only two red parts and two (rather one and a half) of the background color.
As for the reverse, on this piece I'm posting, the mint mark is on the very top (at 12 o'clock) of the Badge.
On the other piece I'm using as a reference to compare, the mint mark is located below the screw (at 6 o'clock).
I also realize the screwnuts are different.
Finally this piece is very light, apparently made of some cheap alloy.
As for the other piece it's told by the seller that it's made of aluminium.

For the other piece (on that well known NJ dealer's site) it's said that the identical piece is from 1964, late 60's to 1991.
Would this one be a different variation? Or it's simply a fake?

Thanks in advance for your opinion.

Dolf