Dash Cluster Bezel Question

[402Bowtie]

Is it safe to say that if a dash cluster bezel has a GM part number stamped on the back side that it is an OEM part? In other words, has anyone seen a reproduction bezel with a GM number stamped in it?

I have a bezel with a GM number stamped in it but it has several differences compared to an original bezel:
-The inner face of the turn indicator holes are chromed. Every original I've seen has a black face in this area.
-The backside is completely chromed. Every original I've seen has a black backside.
-There are a few other very small differences too.

Do reproduction bezels with only two holes cut for wipers and lights (like the first pic) still have the template for cutting the other two holes (in the event you wanted 4 side-holes similar to what is shown in 2nd pic)? Mine has the templates for cutting the other two holes.

Appreciate any info!